A Calculation Method of Target Release Position of Droplets

Abstract

The present invention is applicable to the technical field of droplet impact characteristic simulation, and provides a method for calculating the target release position of a droplet, comprising the following steps: obtaining the first i The impact information when the droplet is released for the first time, the impact information includes the first i The position of the impact point when the droplet is released for the first time and the i The grid cell where the impact point is located when the droplet is released for the first time, and the first i The release position when the droplet is released for the first time x i ; According to the i The distance between the impact point position and the target corner point when the droplet is released for the first time is obtained as the target distance s i ; until s i ≦ S , then release the position x i is the target release location for the droplet. The calculation of the target release position of the droplet provided by the present invention has the advantages of simple calculation, high calculation efficiency, good robustness and high precision of calculation results.

Description

technical field [0001] The invention belongs to the technical field of droplet impact characteristic simulation, and in particular relates to a method for calculating a target release position of a droplet. Background technique [0002] The numerical simulation of icing in aircraft icing is an important method to study the icing characteristics of aircraft, which can meet the guidelines of massive working conditions. In the calculation process of the icing value of the aircraft, the calculation of the droplet collection rate on the object surface is involved, and the calculation accuracy of the droplet collection rate will directly affect the accuracy of the ice shape prediction result. [0003] At present, the Lagrangian method is one of the commonly used methods for the calculation of droplet impact characteristics. The Lagrangian method has the advantages of high motion trajectory accuracy and strong dynamic performance tracking ability, and does not introduce numerical d...

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Problems solved by technology

[0008] 1. In the prior art, the calculation of the droplet collection rate using the Lagrangian method requires a large number of trajectory calculations to describe the droplet collection characteristics, and the rationality of the initial condition setting directly affects the accuracy of the calculation results, and the judgment process is complicated , the calculation process is complex, the calculation efficiency is low and the robustness is poor, and the requirements for the initial conditions are high;

[0009] 2. In the process of calculating the droplet collection rate by the Lagrangian method in the prior art, interpolation technology must be used to transfer the droplet collection rate of the impact point structure to the wall grid unit

However, in actual simulation, the distribution of droplet impact points is usually random and scattered and partly distributed on the wall, which results in uneven distribution or small number of sample points. If this is used as a calculation sample, it will greatly reduce the accuracy of the load interpolation results Accuracy, there is human intervention in the interpolation results, and it has great unreliability

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