Further results of natural laminar flow flight test experimentsFlight test experiments were conducted to measure the extent and nature of natural laminar flow on a smoothed test region of a swept-wing business jet wing. Surface hot film anemometry and sublimating chemicals were used for transition detection. Surface pressure distributions were measured using pressure belts. Engine noise was monitored by a microphone attached to the wing surface to study possible acoustic effects on stability of the laminar boundary layer. Side-slip conditions were flown to simulate changes in effective wing sweep. Flight instrumentation and ground data analysis techniques and a method for measuring intermittency of turbulence are described. Correlation was obtained between the hot film gage signals and chemicals for transition detection. Cross-flow vortices were observed for some flight conditions. Results of spectral and statistical analysis of the hot film signals for various flight test conditions are presented.
Document ID
19860053766
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wentz, W. H., Jr. (Wichita State Univ. Wichita, KS, United States)
Ahmed, A. (Wichita State University KS, United States)
Nyenhuis, R. (Cessna Aircraft Co. Wichita, KS, United States)