Device and method for diagnosing time-space evolution of hypersonic rarefied flow field based on pulse discharge

Abstract

The invention discloses a device and method for diagnosing time-space evolution of a hypersonic rarefied flow field based on pulse discharge. The device comprises a pulse trigger, a pulse power source, an energy storage capacitor, a current-limiting resistor, a needle-shaped discharging electrode, a pulse sequence controller, an ICCD camera and a controller. Through the device and the method, a non-contact optical method is used for showing the fine structure and the continuous time evolution process of the hypersonic rarefied flow field; a needle-needle electrode is used for carrying out pulse discharge; on the one hand, linear light-emitting flow column is used for displaying local section or flow lines of the flow field, and the space resolution of the flow field diagnosis is improved;on the other hand, the flow field instantaneous structure can be obtained on micro-nano second scale, instantaneous images obtained under different pulse times are used for showing the time evolutionprocess of the flow field, and the extremely high flow field diagnosis time resolution is obtained.

Description

technical field [0001] The invention relates to a non-contact flow field diagnosis technology, in particular to a device and method for diagnosing the spatio-temporal evolution of a hyper-ultra-rare flow field based on pulse discharge, which is applied to obtain the fine structure of a hyper-rare flow field and its continuous time evolution process. Background technique [0002] As a country's most important weapon, hypersonic aircraft will play an important role in future national security, and it is a top technology that countries are competing to develop. This type of aircraft is the key pillar for future access to and control of adjacent space to ensure strategic advantages. Hypersonic vehicles need to perform maneuvers such as orbit change, re-entry, and separation in adjacent space, especially in thin air at an altitude of 40-100 km. All aerospace studies regard hypersonic rarefied flow and complex flow phenomena in near-space flight as the core basic scientific probl...

AI Technical Summary

Problems solved by technology

However, the flow fields obtained by these two methods are the time and space integration results of the entire flow field luminous path, and the continuous time evolution process of the local fine structure of the flow field cannot be obtained.

Images