A collection port water spray cooling device for a high temperature wind tunnel

Abstract

The invention relates to a collection port water spray cooling device for a high temperature wind tunnel and belongs to the technical field of wind tunnel tests. The high temperature generally means that the incoming flow total temperature is not less than 3000K. The collection port water spray cooling device is aimed to protect a front section of a diffuser of a high temperature wind tunnel whichoperates for a long time. This is the first time that an ultrahigh temperature and large temperature difference water spray cooling device has been designed and added to an inlet of a diffuser of a high temperature wind tunnel in the country. The device is close to a collection port and can work for a long time in an extreme environment with a total temperature of 3600K. The device can rapidly cool high temperature airflow outer edge air and effectively protect the wall surface of the front section of the diffuser. The collection port water spray cooling device makes enables long-time stableoperation of a wind tunnel at a high temperature and provides a new way for high temperature wind tunnel wall surface protection and tail gas processing. By spraying water to high temperature airflowsprayed out from a spray pipe, the device can cool airflow outer edge, thereby solving the problem in thermal protection of the wall surface of the front section of a diffuser for a high temperature wind tunnel.

Description

technical field [0001] The invention relates to a water spray cooling device for a collection port used in a high-temperature wind tunnel, which belongs to the technical field of wind tunnel tests. The high temperature generally means that the total temperature of incoming flow is not lower than 3000K. Background technique [0002] With the development of aerospace technology, the types of spacecraft are gradually diversifying. In recent years, aircraft characterized by long-term and hypersonic flight in the atmosphere have attracted the attention of researchers from various countries, such as the scramjet aircraft represented by the US X-51, and the aerospace aircraft represented by the US X-37B. plane etc. These new aircraft will face extremely severe thermal loads due to the combined effects of ambient high-temperature air heating, viscous shear force, and aerodynamic pressure during flight, thus putting forward higher requirements for thermal protection technology. [...

AI Technical Summary

Problems solved by technology

In the front of the diffuser exhaust section (including the collector, the sliding contraction section and the second throat, etc.), although there are generally jacketed water cooling for protection, due to factors such as thermal airflow cooling is not obvious, shock wave reflection, etc., Compared with other parts of the diffuser and exhaust section, the wall still has a greater hidden danger of heat protection

Images