Liquid drop target release position calculation method

Abstract

The invention is suitable for the technical field of liquid drop impact characteristic simulation, and provides a liquid drop target release position calculation method, which comprises the following steps: obtaining impact information when a liquid drop is released for the i time, the impact information comprising an impact point position when the liquid drop is released for the i time and a grid unit where the impact point position is located when the liquid drop is released for the i time, obtaining a release position xi when the liquid drop is released for the i time; obtaining a target distance si according to the distance between the impact point position and the target angular point when the liquid drop is released for the i time; until si<=S, determining that the release position xi is the target release position of the liquid drop. The liquid drop target release position calculation method has the advantages of being simple in calculation, efficient in calculation, good in robustness and high in calculation result precision.

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] Numerical simulation of icing in aircraft icing is an important means to study the characteristics of aircraft icing, which can meet the guidelines of a large number of operating conditions. In the calculation process of the aircraft icing value, 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 results. [0003] At present, the Lagrangian method is one of the commonly used methods for calculating 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 dissipa...

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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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