摘要
针对飞机结冰数值模拟中拉格朗日方法计算复杂构型效率低、适应性差的问题,提出一种适用于复杂构型的水滴收集率的拉格朗日快速算法。基于蒙特卡洛粒子统计方法计算水滴收集率以提高算法对于复杂构型的适应性,采用分块追踪结合壁面距离的自适应分析方法确定适当覆盖所有撞击部件的初始水滴释放阵列,提出采用结合沿程水滴网格阵列加密技术和基于误差控制的变步长加速技术提高计算效率,分析并获得了计算效率与加速方法中各控制变量的关系。计算结果表明:所发展的算法能够精确、高效地获得三维水滴收集率,适用于复杂构型,为飞机水滴收集率计算提供了新方法和思路,可以为飞机结冰特性研究、防除冰系统设计等提供技术参。通过调控加密比例系数n(n>1)和加密释放面位置控制系数k(0<k<1),可在有效提升计算效率的同时将计算精度误差3%的范围内。
In order to solve the problems of low efficiency and poor adaptability of Lagrange method in the numerical simulation of aircraft icing,a fast Lagrangian algorithm for water droplet collection efficiency in complex configurations was proposed.Monte Carlo particle release statistical method was used to calculate the water droplet collection efficiency,which can significantly improve the adaptability of the algorithm to complex configurations.By using the adaptive analysis method of grid block tracking and wall impact judgment,the range of initial water droplet release array covering all impacting components can be determined.A method combining the encryption technology of grid array of water droplets along the way and the variable step acceleration technology based on error control was proposed,which can improve the calculation efficiency.Based on this method,the relationship between calculation efficiency and control variables in acceleration method was analyzed and obtained.The calculation results showed that the developed algorithm can obtain the three-dimensional water droplet collection efficiency accurately and efficiently,and can be applied to complex configurations,providing a new method and idea for calculating the collection rate of aircraft water droplets.It can also provide technical parameters for the study of aircraft icing characteristics and the design of anti-icing system.By adjusting the encryption proportional coefficient n(n>1)and the encryption release surface position control coefficient k(0<k<1),it can effectively improve the calculation efficiency and reduce the calculation accuracy error within 3%.
作者
曾涛
王昭力
熊华杰
陈宇
周志宏
ZENG Tao;WANG Zhaoli;XIONG Huajie;CHEN Yu;ZHOU Zhihong(Department of Mechanics,College of Architecture and Environment,Sichuan University,Chengdu 610000,China;Yibin Institute of Industrial Technology,Yibin Sichuan 644000,China)
出处
《航空动力学报》
北大核心
2025年第7期211-219,共9页
Journal of Aerospace Power
基金
国家自然科学基金(12072213)
国家科技重大专项(J2019-Ⅲ-0010-0054)
国家数值风洞工程(NNW2019-JT01-023)。
关键词
蒙特卡洛算法
水滴收集率
拉格朗日
误差控制
飞机结冰
Monte Carlo algorithm
droplet collection efficiency
Lagrangian
error control
aircraft icing
