A Modeling Experimental Method for Simulating Engine Mixing

Abstract

The invention discloses an experimental device for simulating blending of an engine, comprising a mainstream gas inlet section, wherein the mainstream gas inlet section communicates with a blending test section; the blending test section is provided with a nozzle mounting port, a row of cylindrical holes for mounting metal cylindrical rods are formed in the wall surface of one side of the blendingtest section, a closed space extending outwards is further formed in the side of the blending test section, and a first track for mounting transparent glass is arranged on the surface, opposite to the side surface where the cylindrical holes are formed, of the closed space; a second track for mounting a temperature measuring plate is arranged at an outlet of the blending test section; and perspective seams are formed in the side faces of the metal cylindrical rods. The invention further discloses a simulation method of the experimental device for simulating blending of the engine. According to the device, high-power heating and pressurizing equipment is not needed, and visual measurement can be achieved.

Description

technical field [0001] The invention belongs to the technical field of engine jet mixing, in particular to a modeling experiment method for simulating engine mixing. Background technique [0002] The mixing of liquid jet and lateral airflow is an important way to enhance gas-liquid flow and heat transfer. It is widely used in industrial and national defense fields, such as liquid fuel combustion in aero-engines, turbojet engine inlet jet pre-cooling, large-scale The exhaust flame cooling process of the thrust rocket. The mixing of liquid jets and cross-flows mainly includes processes such as atomization of liquids, droplet diffusion and evaporation, and vortex entrainment and entrainment. It has nonlinear and multi-scale characteristics, and there are still challenges in theoretical analysis and complete numerical calculations; experimental research It is the basis for understanding the mechanism and law of gas-liquid two-phase mixing in the above process. Conventional labo...

AI Technical Summary

Problems solved by technology

The mixing of liquid jets and cross-flows mainly includes processes such as atomization of liquids, droplet diffusion and evaporation, and vortex entrainment and entrainment. It has nonlinear and multi-scale characteristics, and there are still challenges in theoretical analysis and complete numerical calculations; experimental research It is the basis for understanding the mechanism and law of gas-liquid two-phase mixing in the above process. Conventional laboratory conditions are usually difficult to simulate the high-temperature and high-pressure environment of the actual engine mixing process, and the cost of heat engine prototype experiments is high. The measurement of field parameters brings great difficulties

At present, there is still a lack of economical and effective experimental methods for the above-mentioned processes in actual engines, which restricts the development of jet mixing gas-liquid two-phase flow process organization technology in engines and the optimal design of engine configurations.

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