基于LBM的结冰表面水滴撞击特性数值模拟

doi:10.7527/S1000-6893.2023.29192

Abstract

Abstract:

In the aircraft icing scenario， a method for solving the water droplet impact characteristics considering the complex geometry is proposed， utilizing the Lattice Boltzmann Method （LBM） method. Firstly， starting from the multi-component lattice Boltzmann model of kinetic theory， the mixed flow field of air and water droplets is proposed to be solved in a single-phase multi-component manner by approximating the motion characteristics of gas-phase water， i.e.， equivalent water droplets， to those of water droplets through several reasonable assumptions. And then， considering the physical properties and assumptions of air and equivalent water droplet flow fields， a flow field calculation model is established. Finally， based on the calculation model， the mixed bypass flow fields of a cylinder and NACA0012 are calculated independently， and the water droplet impact characteristics and their droplet collection coefficient distributions are solved， showing good agreement when compared with data from literature. The results show that the proposed calculation method and computational model can effectively simulate the droplet impact and collection characteristics of equivalent water droplets on the icing surface， and the feasibility of the model is initially verified.

Key words: water droplet impact characteristics, Cartesian grid, lattice Boltzmann method, multi-component, aircraft icing

CLC Number:

V211.3

Dazhi SHI, Weimin SANG, Shijie LI, Bo AN. Numerical simulation of water droplet impact characteristics on icing surfaces based on LBM[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(S2): 729192-729192.

Figures/Tables 16

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Table 1

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参数	数值
参数	圆柱	NACA0012-1	NACA0012-2
速度/（m∙s^-1）	31	67.05	67.05
迎角/（°）	0	4	0
液态水含量/（g∙m^-3）	1	1	1
水滴中值体积直径/μm	20	20	12

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Numerical simulation of water droplet impact characteristics on icing surfaces based on LBM

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