Boundary layer measurements on a ship model, using a laser Doppler velocimeter
Abstract
Boundary layer velocity profiles were measured on a moving ship model in a water tank, using a backscatter laser Doppler velocimeter system (LDS). The LDS has previously given good results when applied to a stationary uniform flow field. Its applicability when measuring the flow around a moving model is assessed. In particular, the performance of the LDS frequency evaluator and photon correlator are considered. Measurement results are shown and compared with theoretical calculations of boundary layer flow past a randomly oriented ship model.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- October 1979
- Bibcode:
- 1979STIN...8210374V
- Keywords:
-
- Boundary Layer Flow;
- Flow Velocity;
- Laser Doppler Velocimeters;
- Water Tunnel Tests;
- Frequency Shift;
- Hydraulic Test Tunnels;
- Scale Models;
- Signal Analysis;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer