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Staged air inlet device and method for inducing strong shock waves

An air intake device and a staged technology, applied in the field of shock tube experiments, can solve the problems of high cost of shock tubes, etc., and achieve the effects of easy operation, reduced use, and increased effective experiment time

Pending Publication Date: 2020-01-14
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to solve the above problems, provide a staged intake device and method for inducing a strong shock wave, and solve the problem of high cost of the existing shock tube technology

Method used

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  • Staged air inlet device and method for inducing strong shock waves

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 A staged air intake device for inducing a strong shock wave is shown, including an expansion section 1, a driving section 3, a sandwich section 4 and an experimental section 5 that are sequentially connected and arranged coaxially. The expansion section 1 and the driving section 3 The valve 2 communicates between them, and the clamped membrane segment 4 is arranged between the driving segment 3 and the experimental segment 5, and between the clamped membrane segment 4 and the driving segment 3 and between the clamped membrane segment 4 and the experimental segment 5 are respectively provided with useful In the diaphragm that separates the chamber, the end of the experimental section 5 is connected with a pressure sensor, and the signal output end of the pressure sensor is connected to a data collector 9 through a signal converter 8, an...

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Abstract

The invention discloses a staged air inlet device and method for inducing strong shock waves. The staged air inlet device comprises an expansion section, a driving section, a diaphragm clamping section and an experiment section which are sequentially connected and coaxially arranged, the expansion section communicates with the driving section through a valve, the diaphragm clamping section is arranged between the driving section and the experiment section, diaphragms for separating chambers are respectively arranged between the diaphragm clamping section and the driving section and between thediaphragm clamping section and the experiment section, the signal output end of the pressure sensor is connected to a data collector through a signal converter, the data collector is used for collecting voltage signals collected by the pressure sensor, the expansion section, the driving section, the diaphragm clamping section and the experiment section are connected to a gas conveying pipeline through valves, and an expansion gas tank used for inflating the expansion section is connected to the gas conveying pipeline. According to the invention, the use of rare resource helium can be greatlyreduced, the experiment cost is saved, and the physical boundary of shock tube high-pressure experiment measurement can be remarkably widened.

Description

technical field [0001] The invention relates to the field of shock tube experiments, in particular to a staged air intake device and method for inducing strong shock waves. Background technique [0002] The modern engine design method based on computational fluid dynamics (CFD) simulation has been widely used in the development of new products by enterprises and model research institutes. The combustion reaction model is a necessary chemical source item for CFD simulation, and its reliability and accuracy will directly affect the design and optimization of the combustion chamber structure. Ignition delay period is an important basic combustion parameter, and its accurate experimental characterization under wide operating conditions is particularly critical for the development of combustion reaction models. The shock tube device can generate strong shock waves to induce the experimental fluid to reach high temperature and high pressure instantaneously, and maintain a constan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/02G01M10/00
CPCG01M10/00G01M15/02
Inventor 张英佳孙五川黄文林黄佐华
Owner XI AN JIAOTONG UNIV
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