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    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
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    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
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    <item>
      <title>THEORETICAL DESIGN OF HIGHLY SKEWED PROPELLER</title>
      <link>https://trid.trb.org/View/466936</link>
      <description><![CDATA[A practical theoretical design method for a highly skewed propeller is presented, which is mainly composed of four steps: a propeller is designed based on the lifting line theory and then lifting surface theory, the propeller optimum skew distribution is determined by the optimization method, the propeller is finalized by the lifting surface theory to meet with design requirements and strength analysis by the finite element method.]]></description>
      <pubDate>Fri, 01 Nov 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/466936</guid>
    </item>
    <item>
      <title>DEVELOPMENT OF A SKEW-BLADE SHAPE FOR A DUCTED CONTROLLABLE PITCH PROPELLER SYSTEM</title>
      <link>https://trid.trb.org/View/455611</link>
      <description><![CDATA[With free-running propellers, increase of the skew has long been used successfully to minimize propeller-induced pressure fluctuations.  With ducted controllable pitch propellers, this blade shape was not considered because of the variation of the gap during reverse conditions.  A new design of the propeller blade for a trawler features a skew of 27.5o.  Comparative tests on model propellers having in the duct conventional and skew blade shapes showed that the higher skew scarcely influences cavitation properties and that thrust and tangential force pulses on the propeller blade and the pressure fluctuations induced by the ducted propeller in free run and towed condition would decrease considerably.]]></description>
      <pubDate>Mon, 04 Mar 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/455611</guid>
    </item>
    <item>
      <title>MEASUREMENT OF PRESSURE DISTRIBUTION ON A CONVENTIONAL AND A HIGHLY SKEWED PROPELLER MODEL - UNDER NON-CAVITATION CONDITION</title>
      <link>https://trid.trb.org/View/434159</link>
      <description><![CDATA[This paper describes new experimental techniques for the measurement of pressure distribution on the blades of propeller models and associated test results. Two kinds of propeller model were studied; a conventional propeller and a highly skewed propeller. Earlier measurements included errors due to blade deformation and improved procedures were devised to eliminate these. Discussion is presented of a comparison of pressure distribution between the measured results and the calculated results given by existing propeller lifting surface theory on the two types of propellers, both in uniform and non-uniform flow. The results are given and analysed.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/434159</guid>
    </item>
    <item>
      <title>DESIGN AND MODEL EVALUATION OF A NEW PROPELLER FOR THE U.S. NAVY'S AUXILIARY OILER AO-177 JUMBO CLASS</title>
      <link>https://trid.trb.org/View/437342</link>
      <description><![CDATA[This paper presents a new design and extensive model test results for a highly-skewed, five blade, fixed-pitch propeller for the U.S. Navy's auxiliary Oiler AO 177 Jumbo.  The design process and powering and cavitation test results are discussed in detail. A comparison of cavitation performance between the existing design and the new propeller is also presented. The AO 177 Jumbo is the stretched AO 177 Class ship with a 32.92m (108 ft) parallel middlebody section inserted into the original hull. The main objective of Jumboisation was to increase cargo carrying capacity by about 50% while retaining the existing 17,900 kW (24,000 hp) propulsion machinery plant. A new propeller design was required to provide the increased thrust but with cavitation performance comparable to or better than that of the existing AO 177. Powering test results, obtained in towing basin tests at DTRC, showed that the new propeller will produce the required rotational speed of 100 rpm, with less than 1% deviation at full power. The cavitation extent is much less than on the original propeller, and the maximum propeller-induced unsteady hull surface pressure pulses are only one-half of those produced by the original seven-blade propeller.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/437342</guid>
    </item>
    <item>
      <title>FUNDAMENTAL CHARACTERISTICS OF MCRS FOR MARINE PROPELLERS</title>
      <link>https://trid.trb.org/View/438996</link>
      <description><![CDATA[The high-strength steel MCRS (Mitsubishi Corrosion Resistance Steel), which has superior characteristics of corrosion fatigue strength and erosion resistance has been increasingly used as a propeller material to improve propulsive efficiency, by reducing the blade area and propellerexcited forces of a highly skewed propeller. Fifteen stainless cast steels were tested and compared with MCRS.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/438996</guid>
    </item>
    <item>
      <title>A PANEL METHOD FOR THE ANALYSIS OF THE FLOW AROUND HIGHLY SKEWED PROPELLERS</title>
      <link>https://trid.trb.org/View/440883</link>
      <description><![CDATA[The paper discusses the performance of panel methods when applied to the analysis of the flow around highly skewed propellers.  A potential-based low-order panel method, which discretizes the propeller surface with planar quadrilateral panels, has been applied to analyse the flow around a propeller with extreme geometries.  The results are much less satisfactory than for conventional geometries.  It is then demonstrated that hyperboloidal panels improve the performance of the method substantially.  A grid oriented along constant radii generates panels with high aspect ratio and high skewness near the propeller tip, which results in inaccurate calculations of velocities.  A "blade orthogonal grid" is developed to solve this problem.  Improvements are obtained with this gridding scheme.  A linear relationship has been found to exist between thickness and circulation distribution for hydrofoils and propellers.  A consistency tests is imposed by applying this linear relationship to compare the results of the panel method and a lifting surface method.  Finally, the improved propeller panel method is tested for convergence, and compared to other methods.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/440883</guid>
    </item>
    <item>
      <title>MEASUREMENT OF PRESSURE DISTRIBUTION AND CAVITY SHAPE ON CONVENTIONAL AND HIGHLY SKEWED PROPELLER MODEL</title>
      <link>https://trid.trb.org/View/441108</link>
      <description><![CDATA[This paper describes two kinds of highly advanced measurement techniques recently developed by the Ship Research Institute of Japan and the measurement results by these techniques.  One is the measurement of pressure distribution on the blades of propeller models working in uniform flow and non-uniform flow behind wire mesh screen under non-cavitating condition.  The other is the measurement of cavity thickness distribution on the propeller blades working behind a complete ship model.  Each measurement was performed on two kins of propellers, i.e. a conventional and highly skewed propeller of the Seiun-maru, on which various full scale measurements had been conducted.  Two measurements showed that a highly skewed propeller has different hydrodynamic characteristics from that of a conventional one, not only on pressure distribution but also on cavity volume. Regarding the pressure measurement, the wavy distributions were obtained, especially at the suction side of a highly skewed propeller.  On th other hand, the second derivatives on time of cavity volume measured at a highly skewed propeller were smaller than that at a conventional one.  Those accurate measurements have provided a number of invaluable data to validate the numerical techniques on propeller and cavitation.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/441108</guid>
    </item>
    <item>
      <title>MEASUREMENT OF PRESSURE DISTRIBUTION ON A FULL SCALE PROPELLER - MEASUREMENT ON A HIGHLY SKEWED PROPELLER</title>
      <link>https://trid.trb.org/View/441368</link>
      <description><![CDATA[No abstract provided.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/441368</guid>
    </item>
    <item>
      <title>STRESS DESIGN CRITERIA FOR HIGHLY-SKEWED HIGH-SPEED PROPELLERS</title>
      <link>https://trid.trb.org/View/441679</link>
      <description><![CDATA[A new generation of cavitating highly-skewed propellers for high-speed craft was introduced some years ago.  The practical application of these new propellers has envisaged some serious stressing problems.  The blade section geometry as originally developed although with good hydrodynamic performance suffered from overstressing ad failures.  Therefore special investigations have been carried out including: - systematic calculation of loading and stresses for a propeller series; - experiments with stress measurements in static and dynamic conditions. Based on the analysis of the results obtained, a practical method for modification of the blade section shape is proposed.  The adequate strength is achieved by subsequent increase of the section thickness in the region of the training edge following a relation obtained from the calculation and experimental data. The procedure proposed is intended to be used at the initial design stages of highly-skewed propeller design for high-speed craft applications.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/441679</guid>
    </item>
    <item>
      <title>A DESIGN METHOD OF HIGHLY SKEWED PROPELLERS WITH NEW BLADE SECTIONS IN CIRCUMFERENTIALLY NON-UNIFORM SHIP WAKE</title>
      <link>https://trid.trb.org/View/443776</link>
      <description><![CDATA[A lifting surface design method for highly skewed propellers with new blade sections is described in this paper.  The Eppler's design code of 2-D sections, the steady and unsteady lifting surface prediction codes and the concept of equivalent 2-D sections are incorporated in this method.  A lifting line design code is used as the first step of the design and the results are provided as initial conditions for the design of new blade sections at various radii.  The working condition of each section at different radius is predicted in circumferentially non-uniform ship wake by the unsteady lifting surface method, and it is adjusted to a better condition using the technique which is discussed in this paper.  The guideline for the design of new blade sections for marine propellers is also discussed in this paper.  An inverse solution of boundary layer integral equations is carried out and the results are verified by experiment.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/443776</guid>
    </item>
    <item>
      <title>THE EFFECT OF PROPELLER SKEW ON THE CAVITY GEOMETRY ON SUCTION SIDE OF BLADES</title>
      <link>https://trid.trb.org/View/444555</link>
      <description><![CDATA[Four propellers with different skew angle distribution and constant pitch distributions were selected in order to clarify the skew effects on the hydrodynamic characteristics of propeller performance. Using these propellers, the effects of the skew distributions on the propeller open-water characteristics, cavity extents and cavity thickness distributions on the suction side of the propeller blades were investigated in towing tank tests and cavitation tests in uniform flow.  The results showed that the increase of the skew angle induces the increase of thrust and torque coefficients, but only slightly changes the efficiency.  The cavity extent and thickness near the blade tip also increased in proportion to the increase of the skew angle.  The potential-based vortex lattice calculations were carried out to obtain detailed information for the calculation of the flow field around the propeller blades in the non-cavitating condition.  Cavity extent and thickness distribution were also calculated by the linearized free streamline theory and compared with the experimental results.  These results showed that the propeller loading near the blade tip increases and the loading near the root decreases with the increase of the skew angle.  The calculated cavity thickness distributions near the blade tip were underestimated but those of the inner part were overestimated.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/444555</guid>
    </item>
    <item>
      <title>THE EFFECT OF SKEW ON THE PROPELLER CAVITATION CHARACTERISTICS IN ON-UNIFORM FLOW FIELD</title>
      <link>https://trid.trb.org/View/446137</link>
      <description><![CDATA[Six propellers with different skew angle distributions and constant pitch distributions were used in order to clarify the skew effects on unsteady cavitation characteristics of marine propellers in non-uniform flow fields.  Using these propellers, the effects of the skew angle and the skew distributions on the propeller cavitation characteristics were investigated experimentally.  Cavitation observations, hull pressure measurements above the propeller, cavity thickness measurements, paint tests and noise measurements were carried out in two different wake fields.  One, a model wake distribution of a car carrier which had bee adopted in comparative erosion tests of the 17th ITTC, and the other is the estimated ship wake distribution by Sasajima and Tanaka's method.  The results of the experiments show the reduction of the hull pressure amplitude as the increase of skew angle, while the cavity volume increases in proportion to the increase of the skew angle.  The effect of the increase in the skew angle seems to reduce the extent and weaken the impulsive pressure of the cloud cavitation which occurs when unsteady cavity collapses.  This is supported by the results of paint tests and cavitation noise measurements.  The falling off area of the paint on suction side of the propeller blades and the sound pressure level are reduced as the skew angle is increased.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/446137</guid>
    </item>
    <item>
      <title>COMPARATIVE STUDY ON THE PERFORMANCE OF HIGHLY SKEWED PROPELLER DESIGNED THEORETICALLY WITH RESULTS FROM MODEL TESTS</title>
      <link>https://trid.trb.org/View/447243</link>
      <description><![CDATA[On the basis of lifting line theory and lifting-plane theory, a highly skewed propeller was designed for a 80000 dwt tanker.  The predicted performance of the theoretically designed propeller was found to have satisfactory agreement with the results of both the open-water and self-propelled model tests.  Comparisons were also made between the theoretically designed propeller and the installed propeller designed by means of a MAU diagram.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/447243</guid>
    </item>
    <item>
      <title>A CASE STUDY ON THE STOPPING ABILITY OF A SHIP WITH A HIGHLY SKEWED PROPELLER BY MEANS OF FULL-SCALE EXPERIMENTS</title>
      <link>https://trid.trb.org/View/447270</link>
      <description><![CDATA[Full-scale stopping tests for various JSO (=U0/ (n.D)) are carried out to evaluate the stopping ability of two training ships equipped with a highly skewed propeller (HSP) and a training ship with a conventional propeller (CP).  The two HSPs show comparatively less astern power than that of a CP in ahead-reverse condition.  Stopping time and distance of the ships with HSPs are found to be longer than those of the ship with a CP.  Also, side reach and final directional angle are slightly larger with the HPS than those of the CP, so it appears that the HSP has slightly stronger power generated to change to head rightward than the CP.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/447270</guid>
    </item>
    <item>
      <title>PRESSURE DISTRIBUTION AND BLADE STRESS ON A HIGHLY SKEWED PROPELLER</title>
      <link>https://trid.trb.org/View/449634</link>
      <description><![CDATA[This paper describes the extensive investigations on pressure and stress on the blade of a highly skewed propeller.  The measurement of pressure distribution on the blades of propeller models working in uniform flow and non-uniform flow behind wire mesh screen and the measurement of pressure distribution and stress on the propeller blades of the highly skewed propeller in full scale were performed.  These were carried out on a conventional propeller as well, of which various full scale measurements have been conducted.  On the highly skewed propeller, complicated and peculiar phenomena in the pressure measurements were found, which could not be predicted by the existing theory.  Furthermore, the measurement of blade stress was performed on the highly skewed propeller working behind the complete ship model with flow liners in the cavitation tunnel.  The measurements on the model corresponded well with those on the full scale.  The present measurements indicated that there still remain some problems to be improved on propeller theories particularly for a highly skewed propeller.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/449634</guid>
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