Small-scale experiments in STOVL ground effectsA series of tests has been completed in which suckdown and fountain forces and pressures were measured on circular plates and twin-tandem-jet generic STOVL (short takeoff and vertical landing) configurations. The tests were conducted using a small-scale hover rig, for jet pressure ratios up to 6 and jet temperatures up to 700 F. The measured suckdown force on a circular plate with a central jet was greater than that found with a commonly used empirical prediction method. The present data showed better agreement with other sets of data. The tests of the generic STOVL configurations were conducted to provide force and pressure data with a parametric variation of parameters so that an empirical prediction method cold be developed. The effects of jet pressure ratio and temperature were found to be small. Lift improvement devices were shown to substantially reduce the net suckdown forces.
Document ID
19910036633
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Corsiglia, Victor R. (NASA Ames Research Center Moffett Field, CA, United States)
Wardwell, Douglas A. (NASA Ames Research Center Moffett Field, CA, United States)
Kuhn, Richard E. (NASA Ames Research Center Moffett Field, CA, United States)