Choking Phenomena of Flows in a Shock Tube

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概要

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• If the flow area of a duct is reduced beyond a limiting value, the flow will be choked and, after a transient period of wave propagation, it will become steady and the flow rate will be decreased. At present, however, the choking phenomenon is not well understood. In this paper, the limiting conditions and the strength of a shock wave which propagates upstream when choking occurs are calculated, assuming that the flow is one-dimensional. Next, the transient flows around six kinds of wedges which were set in the low pressure channel of a shock tube were observed optically both by the schlieren method and a Mach-Zehnder interferometer. As the results, the choking process of the flow and the effect of the choking on the shape and behavior of the reflected shock wave were clarified. When the flow is choked at the wedge section, the experimental results of the velocity of the reflected shock wave agree well with the values calculated by the present one-dimensional method.

• 一般社団法人日本機械学会の論文

著者

• Matsuo Kazuyasu

  Faculty Of Engineering Kyushu University

• KAWAGOE Shigetoshi

  Faculty of Engineering,Kyushu University

• KAGE Kazuyuki

  Faculty of Engineering, Oita University

• Kage Kazuyuki

  Faculty Of Engineering Oita University

• KAWAGOE Shigetoshi

  Kyushu University

• ARAKI Kazuyuki

  Mitsubisi Heavy Industries Ltd.

• KAWAGOE Sigetoshi

  Kyushu University

• Kawagoe Shigetoshi

  Faculty Of Engineering Kyushu University

関連論文

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• Investigations of Transonic Ludwieg Tubes : Part3 Effects of Plenum Exhaust System on Starting Process of Tunnel Test Section
• Investigations of Transonic Ludwieg Tubes Part 2 Starting Process in the Case of a Downstream Valve
• Investigation of Transonic Ludwieg Tubes Part I Starting Process in the Case of an Upstream Valve
• A Study on Characteristic of Pressure Reduction of Compressed Air in a Long Pipe : 2nd Report, A Numerical Analysis : Series B : Fluid Engineering, Heat Transfer, Combustion, Power, Thermophysical Properties
• Choking Phenomena of Flows in a Shock Tube
• An Investigation of Transonic Ludwieg Tubes : 5th Report, Effects of Valve Opening Time on Starting Process of Test Section : Series B : Fluid Engineering, Heat Transfer, Combustion, Power, Thermophysical Properties
• The Interaction of a Reflected Shock Wave with the Contact Region in a Shock Tube
• The Interaction of a Reflected Shock Wave with the Boundary Layer in a Shock Tube
• Investigations of the Aerodynamic Characteristics of the Shock Tubes : Part 3 Transient Flow in Converging-Diverging Nozzles
• Oscillation Phenomena of Pseudo-Shock Waves
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• Investigations of the Aerodynamic Characteristics of the Shock Tubes : (Part 2,On the Formation of Shock Waves)
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• Fast-Acting Valves for Use in Shock Tubes : Part 1, Construction and their characteristics
• Investigations of the Aerodynamic Characteristics of the Shock Tubes : (Part 1,The Effects of Tube Diameter on the Tube Performance)
• Extension of the Steady Flow Duration of a Ludwieg Tube Using a Reservoir-orifice Method : Part11, Case of Orifices with Variable Opening Area
• Investigations of the Aerodynamic Characteristics of the Shock Tubes : Part 4, Aerodynamic Characteristics of Laval Nozzles Installed in a Shock Tube
• Numerical Study of Compression Waves Produced by High-Speed Trains Entering a Tunnel : Effects of Shape of Hood

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