A Study on the Prediction and Measurement of Afterbody Drag for a Supersonic Aircraft

Kim, Won-Cheol

Journal of the Korea Institute of Military Science and Technology 2009;12(6):711-718.

Won-Cheol Kim

초음속 전투기 후방동체 항력 예측 및 측정에 관한 연구

김원철

국방과학연구소

Abstract

During the preliminary design phase of a supersonic aircraft, it is necessary to evaluate many potential engine/airframe combinations to determine the best solution to given set of mission requirements. And it is very important to establish a methodology to predict precisely afterbody drag so that accurate engine installed performance can be estimated. It was carried out in this paper to establish a methodology to predict afterbody drag of F-15K supersonic aircraft based on IMS(Integral Mean Slope) methodology, acquire afterbody drag data and compare its calculated data with the test data acquired from the wind tunnel test data based on 4.7% model scale. The comparison results showed good agreement between the calculated data and test data and it was found that the methodology described here to predict and test afterbody drag is acceptable.

Key Words: Installed Performance, Supersonic Aircraft, Afterbody, Drag, Wind Tunnel Testing