Experimental investigation on shock waves generated by pressurized gas release through a tube |
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| Affiliation: | 1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, People''s Republic of China;2. Department of Aerospace Engineering, University of Maryland, College Park, MD 20742, USA;3. School of Chemical Machinery, Dalian University of Technology, Dalian 116024, Liaoning, People''s Republic of China;1. Mitsubishi Heavy Industries, Ltd., Research and Innovation Center, 5-717-1 Fukahori, Nagasaki 851-0392, Japan;2. Toyota Technological Institute, Graduate School of Engineering, 2-12-1 Hisakata, Tempaku-ku, Nagoya 468-8511, Japan;3. Gifu University, Faculty of Engineering, 1-1 Yanagido, Gifu 501-1193, Japan;4. Aoyama Gakuin University, Graduate School of Science and Engineering, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara-shi, Kanagawa 252-5258, Japan;5. Japan Petroleum Energy Center, Sumitomo Fudosan Shiba-Koen Tower, 11-1, Shibakoen 2-Chome, Minato-Ku, Tokyo 105-0011, Japan;1. JAXA''s Engineering Digital Innovation Center, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuuou, Sagamihara, Kanagawa 252-5210, Japan;2. School of Engineering, University of Tokyo, 2-11-16 Yayoi, Bunkyo, Tokyo 113-0032, Japan;3. Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya, Yokohama, Kanagawa 240-8501, Japan;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, People''s Republic of China;2. Department of Aerospace Engineering, University of Maryland, College Park, MD, 20742, USA;3. School of Chemical Machinery, Dalian University of Technology, Dalian, 116024, People''s Republic of China;1. Joint Institute for High Temperatures of Russian Academy of Science, Izhorskaya str., 13, Build. 2., “OIVT RAN”, 125412, Moscow, Russia;2. Moscow Institute of Physics and Technology, Institutsky per., 9, MIPT, 141700, Dolgoprudny, Russia;3. Bauman Moscow State Technical University, 2nd Baumanskaya str., 5, 105005, Moscow, Russia;1. Centre for Fire and Explosion Studies, School of Mechanical and Automotive Engineering, Kingston University London, Friars Avenue, London SW15 3DW, United Kingdom;2. School of Energy and Power Engineering, Dalian University of Technology, Dalian, China;3. School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom |
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| Abstract: | An experimental investigation on the flow structures and the strength of shock waves generated by high-pressure gas release through a tube into air was conducted. The results demonstrated that a leading shock wave was generated in front of the compressed gas jet and the shock wave speed increased firstly, then decreased and finally kept constant with an increase of the propagation distance in the tube. The experimentally measured Mach numbers of shock waves were close to those calculated from the theory of ideal shock tube flow. After spouting out of the tube, the normal shock quickly developed into a hemispherical shape. The Mach disk was observed in the under-expanded jet. For high-pressure combustible gas release, the concept of theoretical critical pressure of ignition was introduced and several theoretical critical pressures of common gaseous fuels were obtained. |
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| Keywords: | High-pressure release Shock wave Jet Shock-induced ignition Critical pressure |
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