Direct measuring device for unsteady force of interaction of shock wave and model ball

Abstract

The invention discloses a direct measuring device for unsteady force of interaction of shock wave and a model ball. The direct measuring device comprises a high-pressure air source, a driving section, an electromagnetic valve, a driven section, an experiment section, the model ball, a vacuum box and a high-speed data collecting system. One end of the driving section and one end of the driven section are connected through the electromagnetic valve to form a shock tube, the high-pressure air source is connected with the other end of the driving section, one end of the experiment section is connected with the other end of the driven section, the other end of the experiment section is connected with one end of the vacuum box, and a signal line of an accelerometer sensor in a simulation ball in the experiment section is connected with the high-speed data collecting system. The direct measuring device can control pressure ratio between the driving section and the driven section, and stable shock wave mach number is formed. Two semi-spheres of the model ball are connected through an in-built electromagnet and threads, effects on the shock wave and a structure of air flow behind the wave are avoided, and the accelerometer sensor and the high-speed data collecting system are used for achieving direct measuring of the unsteady force of the interaction of the shock wave and the model ball.

Description

technical field [0001] The invention relates to a device for direct measurement of force, in particular to a device for direct measurement of unsteady force in which a shock wave interacts with a model ball. Background technique [0002] Shock-driven gas-solid two-phase flow phenomenon is ubiquitous in nature, and has important applications in many industrial productions, such as: the interaction between shock wave and solid rock during volcanic eruption; combustion flow in solid fuel propellant nozzle Wait. One of the key scientific issues in the study of shock-induced gas-solid two-phase flow is to explore the characteristics of gas-solid two-phase flow driven by shock waves, and to grasp the influence law of shock-loaded particle group drag force. It is a very effective research method to reveal the interaction mechanism between the shock wave and the particle group and to summarize the influence law of the unsteady force through precise measurement and data analysis by ...

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Problems solved by technology

[0003] For the distortion of the shock wave structure and the flow field around the sphere in the above-mentioned background technology, it is difficult to meet the experimental requirements of a higher Mach number, and the shock Mach number is unstable, which is unfavorable for the precise control of the experimental parameters; the purpose of the present invention The purpose is to provide a direct measurement device for the unsteady force of the interaction between the shock wave and the model ball

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