@article{oai:jaxa.repo.nii.ac.jp:00034375,
 author = {OGUCHI, Hakuro and HONMA, Hiroki and FUNABIKI, Katsushi},
 issue = {3},
 journal = {ISAS report/Institute of Space and Aeronautical Science,University of Tokyo},
 month = {Jan},
 note = {First the flow survey is made for the low-density hypersonic flow, which is achieved by a low-density operation of the gun tunnel (or free piston compression). In particular the measurements of flow velocity and, hence, of stagnation temperature are worked out by means of an explosion-wire technique and the flow survey done by traversing a free molecule calorimeter in the test flow region. With these diagnostics the characteristic feature of the test flow is investigated. It is found that, by a low-density operation of the present gun tunnel, the test flow of Mach number 10 and Reynolds number 650 (per cm) is achieved, which is applicable to experimental studies on low-density hypersonic flow problems. Secondly an experimental study is made concerning the shock-layer structure ahead of a sphere in a low-density hypersonic flow, achieved by the present gun tunnel. The scanning-electron-beam densitometer is developed to obtain a density distribution along a scanning path of the beam during one shot of the gun tunnel. By means of this device the density distribution across the shock layer is measured for a sphere of 12.4mm in radius, in which case the Reynolds Re_∞ is about 800. The present data exhibit a qualitative agreement with Lcvinsky-Yoshihara profile which was computed for argon flow of Mach number M=10 and Re_∞=10^3 and 10^2., 資料番号: SA2400496000},
 pages = {83--100},
 title = {Experimental Studies in a Low Density Gun Tunnel Stream},
 volume = {30},
 year = {1965}
}