大气边界层大涡模拟入口湍流生成方法综述

REVIEW OF INFLOW TURBULENCE GENERATION METHODS WITH LARGE EDDY SIMULATION FOR ATMOSPHERIC BOUNDARY LAYER

随着计算资源的飞速发展以及数值模拟技术的不断进步,大涡模拟被越来越多地应用于结构风工程领域的研究。运用大涡模拟准确模拟结构风效应的关键问题之一是生成满足大气边界层风场特性的入口湍流条件。预前模拟法和人工合成法是目前主流的两类大涡模拟入口湍流生成方法。该文阐述了不同入口湍流生成方法的基本原理,并梳理其在结构风工程领域的发展。从结构风工程研究的角度出发,对比分析不同方法的特点及适用性。最后,针对当前大气边界层大涡模拟入口湍流生成方法存在的问题,提出了未来研究的展望。

With the rapid development of available computational resources and advanced simulation techniques, large-eddy simulation(LES) has attracted an increasing attention and been widely adopted in solving structural wind engineering problems. For the reliable simulation of wind effects on structures, the generation of inflow turbulence with prescribed statistical characteristics of being consistent with realistic wind flow characteristics in atmospheric boundary layer(ABL) is one of the key issues. And the existing inflow turbulence generation methods for LES can be classified into two main categories: precursor simulation method and synthetic turbulence generation method. This study introduced the rationale of different inflow turbulence generation methods and reviewed their development and applications in structural wind engineering. From the perspective of structural wind engineering, the features and validities of different methods are comparatively analyzed. Finally, several prospects for future research pertinent to inflow turbulence generation methods in structural wind engineering are proposed to solve the existing problems of inflow turbulence generation methods for large eddy simulation in atmospheric boundary layer.