ADDITIONAL RESISTANCE DUE TO BOUNDARY LAYER SEPARATION IN MODEL TESTING

Contemporary methods for calculating the results of model tests are based on the assumption that their is no boundary layer separation for all scales of models. But, tests carried out recently proved that in some cases, separation exists and must be taken into account. The additional resistance due to this can approach 10-20% of the total model resistance. A method was presented to account for this additional resistance under conditions of infinite flow. When moving in restricted waters the distribution of ship hull pressure varies primarily due to different excited water velocities. These velocities and their distribution lead to earlier boundary layer separation. This paper deals with the influence of the mentioned separation for the models moving in restricted waters on the model resistance.

• Corporate Authors:

  University of Michigan, Ann Arbor

  Department of Naval Architects and Marine Engineers
  Ann Arbor, MI  United States  48109
• Authors:
  • Aztjushkov, L S
• Publication Date: 1970-3

Media Info

• Features: References;
• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Boundary layer separation; Fluid resistance; Hulls
• Uncontrolled Terms: Hull resistance; Scale effect
• Old TRIS Terms: Model testing
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00072751
• Record Type: Publication
• Source Agency: University of Michigan, Ann Arbor
• Report/Paper Numbers: No. 047
• Files: TRIS
• Created Date: Dec 31 1974 12:00AM