Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2024. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ Geometrically Exact Aeroelastic Stability Analysis of Composite Helicopter Rotor Blades in Hover by Updated VABS https://trid.trb.org/View/2301111 Fri, 22 Dec 2023 16:52:46 GMT https://trid.trb.org/View/2301111 Preliminary Aerodynamic Design Strategy for Prop-Rotors Based on Multifidelity Methods https://trid.trb.org/View/2222581 Mon, 28 Aug 2023 09:19:08 GMT https://trid.trb.org/View/2222581 Suppression method for exciting force of pump jet propellers based on sinusoidal unevenly spaced rotor blades https://trid.trb.org/View/2112228 Thu, 23 Mar 2023 10:19:57 GMT https://trid.trb.org/View/2112228 Effects of the stator prewhirl angle on the unsteady force under uniform and turbulent inflow for a pump-jet propulsor: a numerical study https://trid.trb.org/View/2077789 Wed, 25 Jan 2023 09:23:24 GMT https://trid.trb.org/View/2077789 Reducing helicopter 1/rev vibration using extendable trailing-edge plate https://trid.trb.org/View/2046822 Fri, 30 Dec 2022 16:58:39 GMT https://trid.trb.org/View/2046822 Concept Development of a Pneumatically Driven, Fixed Root Circulation Controlled Helicopter https://trid.trb.org/View/1813525 Thu, 27 Oct 2022 11:29:27 GMT https://trid.trb.org/View/1813525 Sustainable data-driven framework via transfer learning for icing-detection of high aspect ratio blades https://trid.trb.org/View/1996608 Tue, 20 Sep 2022 14:33:40 GMT https://trid.trb.org/View/1996608 Modeling and dynamic characteristic analysis of dual rotor-casing coupling system with rubbing fault https://trid.trb.org/View/1926367 Wed, 25 May 2022 09:40:08 GMT https://trid.trb.org/View/1926367 Development of a preliminary design tool for rotary wing aircrafts https://trid.trb.org/View/1910652 Tue, 29 Mar 2022 10:20:23 GMT https://trid.trb.org/View/1910652 Research on active control method of rotor blade synchronous vibration based on additional secondary excitation forces https://trid.trb.org/View/1895229 Mon, 28 Mar 2022 10:29:57 GMT https://trid.trb.org/View/1895229 Big Adaptive Rotor Phase I Final Report https://trid.trb.org/View/1922742 5 MW) while reducing levelized cost of energy (LCOE). Where SP is defined as the ratio between the turbine rating and rotor swept area. The BAR project was formed as a multilaboratory consortium in 2018. Phase I of the project focused on identifying technology to overcome the transportation and operational limitations for a 5-MW wind turbine with a 206-m rotor and developed promising designs incorporating lightweight and flexible structures that are less expensive and more reliable than current segmented-blade approaches. The BAR team investigated several innovative 100-m blade technologies (Johnson et al. 2019), and the most promising BAR concepts were found to be (1) highly flexible, controlled bending blades for rail transport, (2) downwind rotors to accommodate the highly flexible blades without the risk of a tower strike, and (3) distributed aerodynamic control (DAC) devices to control the load on the highly flexible blades. In Phase I, the team also identified several science and engineering challenges and areas of focus to accelerate the advancement of the BAR concepts. This report contains a summary of the activities completed in Phase I of the BAR project. Five distinct tasks were completed in this project: (1) assessed the trends, impacts, and value of low-specific-power wind turbines; (2) developed a wind turbine blade cost-reduction road map study; (3) completed research-and-development opportunity screening; (4) performed model improvements and detailed design studies; and (5) assessed low-cost carbon fiber.]]> Tue, 22 Mar 2022 09:45:13 GMT https://trid.trb.org/View/1922742 Development of a durable ice protective coating for use on rotorcraft https://trid.trb.org/View/1887594 Tue, 16 Nov 2021 15:18:44 GMT https://trid.trb.org/View/1887594 Effect of flight/structural parameters and operating conditions on dynamic behavior of a squeeze-film damped rotor system during diving–climbing maneuver https://trid.trb.org/View/1841084 Thu, 23 Sep 2021 08:36:24 GMT https://trid.trb.org/View/1841084 Investigation on the flow-control strategy for an aggressive turbine transition ducts https://trid.trb.org/View/1846461 Thu, 27 May 2021 12:39:44 GMT https://trid.trb.org/View/1846461 Investigation on tip clearance control for the high-pressure rotor of an uncooled vaneless counter-rotating turbine https://trid.trb.org/View/1846458 Thu, 27 May 2021 12:39:44 GMT https://trid.trb.org/View/1846458