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| 1 | Experimental investigation of hypersonic flow induced separation over double wedges显示文摘流动分离在偏斜的控制表面在极超音速的再废车辆上并且在入口产生的压缩角落上发生走开喷气引擎。象双楔和两倍锥模型一样的配置为学习分开的流动特征是有用的。在凹面角落附近的流动地是相对复杂的并且生产几古典粘滞取决于第一和第二楔或锥一半的联合的流动特征顶角度。特别地典型的现象主要是吃惊 / 边界层,吃惊 / 吃惊相互作用,不稳定砍层和非线性的吃惊摆动。尽管大多数这些基本煤气的动力学特征是众所周知的,什么以高热含量条件发生,不是清楚的。这篇论文在 4.8 MJ/kg 的停滞热含量在双楔上报导流动领域的结果。实验在 6.99 的一个名字的马赫数字在一条免费活塞吃惊隧道被执行。Schlieren 和两倍暴露 holographic interferometry 被使用在双楔上设想流动地。 | Tokitada Hashimoto | 2009 | Journal of Thermal Science2009，18，3： | 2 |
| 2 | Effect of Nozzle Inlet Shape on Annular Swirling Flow with Non-Equilibrium Condensation显示文摘Recently,by combining a swirl flow with non-equilibrium condensation phenomena of condensate gas generated in a supersonic flow,a separating and extracting techniques of condensate gas have been developed.This technique can reduce the size of the device and don't use chemicals.In the present study,by using a non-equilibrium condensation phenomenon of moist air occurred in the supersonic flow in the annular nozzle composed of an inher body and an outer nozzle with a swirl,the possibility of separation of the condensable gas and the effect of shape of nozzle inlet on the flow field were examined numerically. | Yusuke FUKUSHIMA Shigeru MATSUO Toshiaki SETOGUCHI Norimasa SHIOMI Tokitada HASHIMOTO Heuy Dong KIM and Shen YU | 2015 | Journal of Thermal Science2015，24，4： | 1 |
| 3 | Control of the Asymmetric Flow in Rocket Nozzles显示文摘In some rocket nozzle flows, the existence of the transition from FSS to RSS and the occurrence of asymmetric flow are known in previous researches. As a result, the transition causes excessive side-loads that may damage the nozzle. Thus, it is important to investigate the method in order to control the asymmetric flow separation. In the present study, the relationship between the asymmetric separation and the rate of change of the pressure ratio with time was investigated from the point of view of the transition from FSS to RSS in the supersonic nozzle experimentally. Further, change of the flow separation by using step and cavity, and the possibility of the control was demonstrated. As a result, it was shown that the method using a cavity was effective for the control of the separation pattern. | Shigeru Matsuo Shotaro Suetsugu Junji Nagao Tokitada Hashimoto Toshiaki Setoguchi Heuy Dong Kim | 2013 | Journal of Thermal Science2013，22，2： | 1 |
| 4 | Control of Transonic Flow Fields Using Local Occurrence of Non-Equilibrium Condensation显示文摘Control of supersonic flow fields with shock wave is important for some industrial fields. There are many studies for control of the supersonic flow fields using active or passive control. When non-equilibrium condensation occurs in a supersonic flow field, the flow is affected by latent heat released. Many studies for the condensation have been conducted and the characteristics have been almost clarified. Further, it was found that non-equilibrium condensation can control the flow field. In these studies, the condensation occurs across the passage of the flow field and it causes the total pressure loss in the flow field. However, local occurrence of non-equilibrium condensation in the flow field may change the characteristics of total pressure loss compared with that by the condensation across the passage of the nozzle and there are few for researches of locally occurred non-equilibrium condensation in supersonic flow field. The purpose in the present study is to clarify the effect of local occurrence of non-equilibrium condensation on the transonic flow field in a nozzle with a circular bump. As a result, local occurrence of non-equilibrium condensation reduced the shock strength and total pressure loss in the transonic flow field by flowing the moist air from trailing edge of the circular bump to the mainstream. | Junji Nagao Shigeru Matsuo Tokitada Hashimoto Toshiaki Setoguchi Heuy Dong Kim | 2013 | Journal of Thermal Science2013，22，4： | 0 |
| 5 | Generating and Focusing of Underwater Expansion Wave using a Silicon Resin Reflector显示文摘In the present study, an ellipsoid reflector was designed and produced using silicon resin in order to generate and focus expansion wave in water for the purpose of a medical application. Across an expansion wave the static pressure, temperature and density decrease, as a result, negative pressure is given behind the expansion wave generated in the water, and then a tensile stress is induced. As an acoustic impedance of the silicon resin is almost similar to that of water, the interface of air-silicon resin would be regarded as the same with that of the air-water. A high voltage discharge was used as an energy source of underwater shock wave. When the underwater shock wave reflects on this interface, it is already clear that the shock wave converts to the expansion wave. The generation and focusing of the expansion wave were carried out and the phenomena were observed by flow visualization using a high-speed camera. | Takafumi Nakabaru Tokitada Hashimoto Shigeru Matsuo Toshiaki Setoguchi G.Rajesh | 2013 | Journal of Thermal Science2013，22，3： | 0 |
| 6 | Investigation on Temperature Separation and Flow Behaviour in Vortex Chamber显示文摘In the previous researches, it is known that the swirl flow in circular pipe causes the temperature separation. Recently, it is shown that the temperature separation occurs in a vortex chamber when compressed air are pumped into this device from the periphery. Especially, in a cavity installed in the periphery of the chamber, the highest temperature was observed. Therefore, it is expected that this device can be used as a heat source in the engineering field. In recent researches, the mechanism of temperature separation in vortex chamber has been investigated by some researchers. However, there are few researches for the effect of diameter and volume of vortex chamber, height of central rod and position of cavity on the temperature separation. Further, no detailed physical explanation has been made for the temperature separation phenomena in the vortex chamber. In the present study, the effects of chamber configuration and position of the cavity on temperature separation in the vortex chamber were investigated experimentally. | Yuhi Matsuno Yusuke Fukushima Shigeru Matsuo Tokitada Hashimoto Toshiaki Setoguchi Heuy Dong Kim | 2015 | Journal of Thermal Science2015，24，2： | 0 |
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