Výsledky vyhledávání - "Syuichi, Watanabe"

Influences of Properties of Primary Flows on Internal Flows of Mixing Tubes

Autor: Syuichi Watanabe, Goro Masuya, Eijiro Kitamura, Sadatake Tomioka, Noboru Sakuranaka

Publikováno v: JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 57:9-17

The influences of the molecular weight and total temperature of a primary gas on the flow fields of constant-area mixing tubes for ejector-jets were investigated. First, in order to investigate the exit choke, parametric studies were carried out for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a2e3bcb55e110b00dc571230fd0d1b2c
https://doi.org/10.2322/jjsass.57.9

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Dominant Parameter for Pressure Recovery Performanceof Constant-Area Mixing Tubes of Ejector Jets

Autor: Noboru Sakuranaka, Syuichi Watanabe, Goro Masuya, Sadatake Tomioka, Eijiro Kitamura

Publikováno v: JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 57:1-8

A new variable termed the ejector drive parameter was proposed as a dominant parameter of the pressure recovery ratio of constant-area mixing tubes. It was derived from the one-dimensional analysis of a zero-secondary flow mode. This parameter repres

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f4e13a3228a00215b1af551358c83b3
https://doi.org/10.2322/jjsass.57.1

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Investigations of Internal Flow Fields of Constant-Area Mixing-Tubes under Starting-Limit Conditions

Autor: Syuichi Watanabe, Noboru Sakuranaka, Goro Masuya, Sadatake Tomioka, Eijiro Kitamura

Publikováno v: JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 57:47-55

Flow fields in the constant-area mixing tubes of ejector jets were investigated under the starting-limit conditions of an aerodynamic choking mode by performing numerical simulations and cold flow experiments. Pressure recovery was almost completed i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f04a6c958bee42ae298117b3cad8a387
https://doi.org/10.2322/jjsass.57.47

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Supersonic Flow Choking in Engine Wind Tunnels

Autor: Syuichi Watanabe, Koichiro Tani, Toshinori Kouchi, Noboru Sakuranaka, Tohru Mitani, Hiroshi Miyajima

Publikováno v: JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 55:43-50

Breakdown of diffuser flow was often observed in our scramjet engine tests. This facility operation may damage the engine wind-tunnel and should be prevented. An one-dimensional analysis was applied to the diffuser flow to identify the causes of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7cc2793106226b89474c100de595a6d
https://doi.org/10.2322/jjsass.55.43

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Aerodynamic Tests of Scramjet Engines with Variable Mach Number Nozzle

Autor: Goro Masuya, Masahiro Takahashi, Noboru Sakuranaka, Syuichi Watanabe, Eijiro Kitamura, Tohru Mitani

Publikováno v: JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 53:288-294

A simple variable Mach number nozzle for aerodynamic engine tests was designed and calibrated. In this new nozzle, only one hydraulic actuator made freestream Mach number change from 2 to 4 during a run of the wind tunnel. The optimization of the noz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5c11f951695e505bcf3080ba3ef4ac85
https://doi.org/10.2322/jjsass.53.288

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Evaluation of Air Capture Ratio of Scramjet Inlet by Multi-Point Pressure Measurement

Autor: Noboru Sakuranaka, Muneo Izumikawa, Eijiro Kitamura, Tohru Mitani, Syuichi Watanabe, Goro Masuya

Publikováno v: JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 53:22-28

A method to evaluate aerodynamic performances of scramjet engines by using multi-probe rakes was proposed. The aerodynamic tests were carried out under Mach 4 flight conditions. The Pitot and static pressures were measured at 250 points in the cross

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ebcaca909c52e17a974374d5f6cd16bf
https://doi.org/10.2322/jjsass.53.22

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Three-Component Force Measurements for Scramjet Engines 2) Effects of External Flow and Boundary Layer Ingestion

Autor: Muneo Izumikawa, Tohru Mitani, Syuichi Watanabe, Takashi Shimura, Yuichi Tarukawa

Publikováno v: JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 51:252-259

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d541f69048709d724abc80b74da08eec
https://doi.org/10.2322/jjsass.51.252

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5.5kW YAG Laser System with Combined Beams from Three Oscillators and Its Application to Materials Processing

Autor: Hiroshi Miura, Shigeki Fujinaga, Akira Ohmori, Keiji Okino, Syuichi Watanabe, Toru Narikiyo

Publikováno v: The Review of Laser Engineering. 26:747-753

We constructed a system incorporating integration optics and a newly developed pulse excited YAG laseroscillator of 1.5 kW average power. Two CW YAG laser oscillators of 2 kW average power, and a PC were alsoincorporated. The integration optics combi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6a943d2b209251c9b2c0d998822bf687
https://doi.org/10.2184/lsj.26.747

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