Anti-frosting alcohol spraying reaction characteristic testing device for precooler of precooling engine

Abstract

The invention discloses an anti-frosting alcohol spraying reaction characteristic test device for a precooler of a precooling engine, and relates to the field of spacecraft engines. Theanti-frosting alcohol spraying reaction characteristic test device comprises a Laval nozzle, a rectification section, an alcohol spraying test section, a contraction switching section, a rectangular diversion trench and a precooler module. The Laval nozzle, the rectification section, the alcohol spraying test section and the contraction switching section are sequentially connected from front to back; a rectangular flow guide groove is formed in the upper end of the interior of the alcohol spraying test section in the front-back direction, the upper end of the rectangular flow guide groove is open and covered by an alcohol spraying panel, two or more hole sets are formed in the front end of the alcohol spraying panel in the front-back direction, and each hole set is composed of one or more wall face injection small holes. An alcohol accumulation liquid cavity extending in the left-right direction is formed in the position, corresponding to each hole set, of the alcohol spraying panel, the top of each alcohol accumulation liquid cavity communicates with a movable alcohol supply system, and the bottom of each alcohol accumulation liquid cavity communicates with the interior of the rectangular flow guide groove through the corresponding hole set; the front end and the rear end of the rectangular flow guide groove are open, and a precooler module is arranged at the opening of the rear end of the rectangular flow guide groove.

Description

technical field [0001] The invention relates to the technical field of spacecraft engines, in particular to a test device for anti-frosting and alcohol-spraying reaction characteristics of a pre-cooling engine pre-cooler. Background technique [0002] As humans pay more and more attention to reusable aerospace vehicles with horizontal takeoff and landing, the power plant has also proposed a wide range of work, reusability, horizontal takeoff and landing, and high specific impulse performance and Thrust-to-weight ratio and other requirements. Existing power plants mainly include rocket engines, turbine engines, ramjet engines, etc. It is difficult for a single engine to meet such requirements. Turbine, rocket and ramjet combined engines are the current research hotspots. When the turbo-based combined engine works in the air-breathing mode with a higher Mach number, the total temperature of the incoming flow after being compressed in the intake port is high, which limits the...

AI Technical Summary

Problems solved by technology

Alcohols (such as methanol and ethanol) are commonly used condensable substances, but they are flammable. Since they need to be injected into the mainstream air in advance, when the flight Mach number is large and the total temperature of the incoming flow is high When there is a possibility of violent chemical reaction or even burning with the mainstream, it will not only affect the effect of inhibiting frost formation, but may even cause damage to the structure of the precooler

The above problems cannot be accurately and quantitatively explained only by theoretical analysis. Therefore, relevant experiments need to be carried out to quantitatively explain whether alcohol anti-icing agents can smoothly enter the precooler in the high-temperature mainstream

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