Accession Number:
ADA045425
Title:
Assessment of Load Alleviation Devices Installed on a Power-Augmented-Ram Wing over Irregular Waves.
Descriptive Note:
Final rept. Oct 76-Aug 77,
Corporate Author:
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD AVIATION AND SURFACE EFFECTS DEPT
Personal Author(s):
Report Date:
1977-08-01
Pagination or Media Count:
70.0
Abstract:
An investigation was conducted on Carriage III at the David W. Taylor Naval Ship Research and Development Center to determine the motions and performance of a power-augmented, wing-in-ground-effect model with load alleviation devices. The effects of soft and bumpered endplates and a flexible flap were investigated for a range of velocities, thrust-to-weight ratios, and irregular wave sea states. Results show that the flexible flap can provide a smoother, softer ride for a thrust-to-weight ratio of 0.20, but at the expense of decreased average heave and increased average drag. Results also indicate a transport efficiency degradation from 23.18 to 10.06 with increase in sea state from 0 to 5 for the model without load alleviation. The results are inconclusive for the soft and bumpered endplates. Author
Descriptors:
Subject Categories:
- Aircraft
- Fluid Mechanics