@article{oai:jaxa.repo.nii.ac.jp:00032624,
 author = {辛島, 桂一 and 佐藤, 清 and KARASHIMA, Keiichi and SATO, Kiyoshi},
 issue = {1_B},
 journal = {東京大学宇宙航空研究所報告},
 month = {Mar},
 note = {本報告は軸対称鈍頭物体の前面に装着した傘状熱防禦板の熱遮蔽効果を明らかにする目的で行われた実験の結果に関するものである.実験はマッハ数8の極超音速風洞を用いて行われ,本体の表面温度分布及び熱伝達特性に対する傘の面積,離脱距離及び形状の効果が詳細に調べられ,その空気力学的機構が検討されている.傘状熱防禦板の熱遮蔽効果は主して傘によって遮蔽される本体表面部分に限られ,その下流の露出表面には付加的効果が殆んど及ばないことが指適され,熱防禦効果の観点から,傘の最適離脱距離及び最適面積が存在することが明らかにされている.最適離脱距離の値は本体頭部曲率半径の約40%で与えられ,この値は傘の面積や形状に対する依存性が小さく,ほぼ一定である., This paper concerns with an experimental study on heat-shield effectiveness of heat protection umbrellas mounted on a blunt-nosed axisymmetric body. The experiment is conducted in a hypersonic wind tunnel with free stream Mach number of 8, and the effect of various parameters such as area, detachment distance and shape of the umbrellas on temperature and heating characteristics over the body surface is examined in detail. It is shown that the umbrella has sufficient heat-shielding effect over the shaded area of the body surface, whereas it has little additional effect over the exposed surface downstream. From the viewpoint of the overall heat-shield effectiveness of the umbrella, it is pointed out that there exist an optimum detachment distance as well as an optimum area obtainable in the sense of the maximum area efficiency. Detailed examination reveals that the optimum detachment distance is nearly 40 percent of the nose radius of curvature of the body and is roughly insensitive to the area and shape of the umbrella., 資料番号: SA0125965000},
 pages = {207--221},
 title = {<論文>傘状熱防禦板の熱遮蔽効果に関する実験的研究},
 volume = {17},
 year = {1981}
}