Aerodynamically Induced Motions of Bluff Bodies Suspended Beneath Helicopters
Abstract
In this report, which is concerned with an investigation into aerodynamic mechanisms supporting underslung load instability, the results of the three years' work are presented and discussed. Certain important dynamic features of the aerodynamic actions on rectangular cargo container shapes have now been identified, namely those arising from the existence of some appreciable phase lags in the growth and decay of separation bubbles. It is shown that some of the aerodynamic coefficients vary with frequency to such an extent that the use of quasi-steady aerodynamic theory may lead to meaningless results. Also, free stream turbulence is shown to exert a profound effect on container stability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1975
- Accession Number
- ADA020621
Entities
People
- Andrew K. Simpson
- D. Chan
- J. W. Flower
Organizations
- University of Bristol