An engine anti-icing system

Abstract

The invention discloses an anti-icing system of an engine. The anti-icing system of the engine comprises a rectifying supporting plate and a rectifying cover hood. The rectifying supporting plate comprises a first cavity, a second cavity and a third cavity. The first cavity, the second cavity and the third cavity are adjacent to one another. Exhaust holes are formed in the second cavity and the third cavity of the rectifying supporting plate. The rectifying cover hood communicates with the rectifying supporting plate. A partition plate is arranged in the rectifying cover hood. The rectifying cover hood is divided into a first partitioned cavity and a second partitioned cavity through the rectifying cover hood. The first partitioned cavity communicates with the second partitioned cavity. The first partitioned cavity communicates with the first cavity. The second partitioned cavity communicates with the second cavity and the third cavity. According to the anti-icing system of the engine, ice prevention is conducted through the pipe flow heat exchange mode, the hot air is high in temperature and flow, the heat exchange coefficient of the supporting plate leading edge and the side wall of the first cavity of the rectifying supporting plate is guaranteed, and the heat exchange effect from the top to the bottom of the whole first cavity of the rectifying supporting plate is guaranteed.

Description

technical field [0001] The invention relates to the technical field of engine anti-icing, in particular to an engine anti-icing system. Background technique [0002] When the aircraft flies under the condition of temperature below zero and small Mach number, due to the existence of supercooled water droplets in the air, the surface of the engine inlet rectifying strut plate and the cowling cover will be icy. The icing of the rectifying struts and the cowl will change the aerodynamic shape of the struts and the cowl, resulting in a decrease in aerodynamic performance, and at the same time, the icing of the struts will reduce the air intake area. In addition, the ice accumulation and falling off of the support plate and the cap may injure or damage the core components of the engine, which will have a great impact on the performance of the engine and flight stability. Therefore, it is necessary to carry out an anti-icing structure design on the engine inlet rectifying strut an...

AI Technical Summary

Problems solved by technology

[0004] This anti-icing method has the following disadvantages: 1. Due to the particularity of the inner cavity structure of the rectifying strut, the impact hole is far away from the impact target surface, and the impact heat transfer coefficient is greatly affected by the distance between the impact hole and the impact target surface. Therefore, it is impossible to ensure that the impact heat transfer can achieve the optimal heating effect; 2. Because the structure of the anti-icing hole is irregular, the surface integrity of the anti-icing hole is reduced, which may cause safety hazards; 3. Since most of the hot air is discharged through the front cavity of the support plate , only a small part of the hot air flows into the hood, and the temperature of the hot air entering the hood is low, which will inevitably lead to poor anti-icing ability of the hood

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