A Simulation Method of Wall Surface Temperature in Anti-icing System

Abstract

The present invention is applicable to the field of anti-icing technology, and provides a method for simulating the wall surface temperature of an anti-icing system. Mesh division is consistent; the initial wall temperature is obtained through the dry air flow field simulation module T s 0 ;Through the i‑1th wall temperature T s i‑1 Calculate the total energy of the surface film Q i‑1 , by dividing the total surface film energy Q i‑1 Substitute into the dry air flow field simulation module to obtain the i-th wall temperature T s i ;Judging the i-th wall temperature T s i Convergence; if the i-th wall temperature T s i does not converge, then let i=i+1 , repeat the above steps; if the i-th wall temperature T s i Convergence, that is, the i-th wall temperature T s i is the final wall temperature. The invention provides a wall surface temperature simulation method with good convergence, convenient solution and closer to the real physical process.

Description

technical field [0001] The invention belongs to the technical field of anti-icing and in particular relates to a method for simulating the wall surface temperature of an anti-icing system. Background technique [0002] The formation of icing on the surface of aerospace vehicles in the air is very harmful. It not only increases the weight of the aerospace vehicle, but also destroys the aerodynamic shape of the aerospace vehicle, increases the resistance of the aerospace vehicle, leads to a decrease in maneuverability and stability, and may cause severe damage. accident. The existing icing protection systems of aerospace vehicles are divided into two categories: one is the anti-icing system, that is, the system that does not allow ice to form on aerospace components; the other is the deicing system, that allows If there is a small amount of ice on the surface, then perform periodic deicing. [0003] The hot gas anti-icing method is to draw high-temperature and high-pressure ...

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Problems solved by technology

[0008] 1. The convergence calculated by using the simulation method of separating the inside and the outside depends heavily on the assumption of the initial temperature or initial heat flow of the wall. Once the assumed initial temperature and initial heat flow deviate greatly from the real data, the entire iterative process will not converge;

[0009] 2. The existing simulation method ignores the temperature gradient of the surface film along the height direction, and thinks that the temperature at the bottom and top of the surface film is the same. However, under real conditions, there is a temperature difference between the upper and lower surfaces of the surface film, so heat can be transferred, although it can achieve anti-icing The simple analysis before the design of the system is difficult to be used for the complete analysis of the anti-icing system, which reduces the accuracy of the simulation;

[0010] The simulation of the existing method needs to establish two sets of grids, and divide the internal dry air flow field and the external dry air flow field separately, which increases the workload and complexity of the calculation, and has the problem of low calculation efficiency

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