Institute of Space and Astronautical Science (ISAS)
Institute of Space and Astronautical Science (ISAS)
Institute of Space and Astronautical Science (ISAS)
Institute of Space and Astronautical Science (ISAS)
National Aerospace Laboratory
National Aerospace Laboratory
出版者
宇宙科学研究所
出版者（英）
Institute of Space and Astronautical Science
雑誌名
The Institute of Space and Astronautical Science report. S.P. : Aerodynamics, Thermophysics, Thermal Protection, Flight System Analysis and Design of Asteroid Sample Return Capsule
巻
17
ページ
133 - 144
発行年
2003-03
抄録（英）
In order to study the onset of the ablation gas-induced boundary layer transition during the reentry phase, heat flux measurement through infrared thermography has been conducted on the capsule-shape body with gas injection from the porous material surface in the shock wind tunnel. In the present simulation experiment, Reynolds number and the ratio of the gas injection mass flow rate to the main mass flow is parametrically changed as similarity law parameters taking account of those in the flight environment; not a few assumptions are applied without verification; the effect of temperature of the boundary layer and the wall etc. At the local Reynolds number of 4 x 10(exp 4) and the ratio of gas injection to main flow is about 2 percent, the heat flux enhancement at the skirt part of the capsule model has been observed and it is considered to be an evidence of the boundary layer transition form laminar to turbulence.
An Experimental Study on the Boundary Layer Transition due to Gas Injection from Capsule-shape Body Surface
SA0200020.pdf
(2.81MB)
