Ultrahigh-speed reentry test airflow ground simulation test device

Abstract

An ultrahigh-speed reentry test airflow ground simulation test device comprises a gas source system, a detonation section and the like. The gas source system fills hydrogen and oxygen into the detonation section through the gas conveying pipeline, detonation waves are formed after the hydrogen and oxygen mixture is detonated, the detonation waves break through a film, a first main shock wave and acenter expansion wave are formed in the shock tube, and test gas in the shock tube is compressed and accelerated by the main shock wave. The main shock wave propagates downstream to the secondary membrane in the test gas and breaks through the secondary membrane, then a second incident shock wave and a central expansion wave are formed in an acceleration section, the test gas is continuously accelerated to move downstream through the unsteady expansion effect of the second central expansion wave, and the test gas is further accelerated in the spray pipe through the steady expansion effect. Test gas at an outlet of the spray pipe can reach a reentry speed condition through the triple acceleration effect, and a vacuum system integrally pumps the part from the acceleration section to the test and pressure relief section to a high vacuum state. According to the invention, the ground simulation requirement of a high-enthalpy flow environment during ultra-high-speed reentry flight of an aircraft is met.

Description

technical field [0001] The invention relates to an airflow ground simulation test device. Background technique [0002] In the new century, countries around the world are increasingly interested in space exploration and interstellar travel, which puts forward higher and higher requirements for the speed of aircraft. For example, when the U.S. space shuttle re-enters the atmosphere from the earth's low-earth orbit, the speed is 7.3km / s. When the Apollo spacecraft returns to the earth's atmosphere after landing on the moon, the re-entry speed is as high as 11.2km / s. The exploration of Mars and other planets in the far solar system When the vehicle returns, the reentry speed is as high as 15km / s. As the flight speed and altitude of the aircraft continue to increase, the surrounding flow environment it faces has also changed, from simple frozen flow to balanced flow and complex unbalanced flow. Due to the existence of the high-temperature real gas effect, the microscopic physi...

AI Technical Summary

Problems solved by technology

Due to the existence of the high-temperature real gas effect, the microscopic physical and chemical phenomena of the gas will have an impact on the macroscopic aerodynamics and thermal laws of the aircraft and the aerodynamic physical characteristics of the surrounding flow field through the process of thermodynamics and shock wave dynamics. Difficult to do, high temperature real gas effect makes accurate prediction of aerodynamic heat and force more difficult

[0003] The complexity of the high-enthalpy flow environment during the ultra-high-speed re-entry flight of the aircraft has brought great difficulties to its research, and its complexity has greatly restricted the theoretical analysis. Verification and correction of test results

Images