RANS的表面粗糙度在飞机冰积模拟中的应用综述

IF 1.8 Q3 MECHANICS
Fluids Pub Date : 2023-10-15 DOI:10.3390/fluids8100278
Kevin Ignatowicz, François Morency, Héloïse Beaugendre
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引用次数: 0

摘要

实验和数值流体动力学研究强调了在表面粗糙度存在下流动结构的变化。这些变化涉及壁面换热和壁面摩擦,但主要局限于边界层内部区域。飞机飞行结冰是一种典型的应用,其中粗糙表面对气流结构和随后的冰生长起着重要作用。这项工作的目的是研究如何在具有壁面分辨边界层的航空应用RANS中处理表面粗糙度,重点是冰引起的粗糙度。文献综述表明,在实验数据上校准了半经验相关性,以模拟存在粗糙度的流动变化。RANS的相关性不能明确地解决单个粗糙度。它们主要涉及湍流模型的修改,以解释近壁区域速度和温度分布的变化。等效砂粒粗糙度(ESGR)方法是一种流行的粗糙度度量,并被用作RANS模型的长度尺度。对于飞行中的结冰,考虑到表面几何形状和大气条件,建立了相关性。尽管有这些研究努力,但在某些特定条件下存在不确定性,其中空间和时间粗糙度的变化使模拟难以校准。解决这一差距的研究可以帮助改善冰的增加预测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Surface Roughness in RANS Applied to Aircraft Ice Accretion Simulation: A Review
Experimental and numerical fluid dynamics studies highlight a change of flow structure in the presence of surface roughness. The changes involve both wall heat transfer and skin friction, and are mainly restricted to the inner region of the boundary layer. Aircraft in-flight icing is a typical application where rough surfaces play an important role in the airflow structure and the subsequent ice growth. The objective of this work is to investigate how surface roughness is tackled in RANS with wall resolved boundary layers for aeronautics applications, with a focus on ice-induced roughness. The literature review shows that semi-empirical correlations were calibrated on experimental data to model flow changes in the presence of roughness. The correlations for RANS do not explicitly resolve the individual roughness. They principally involve turbulence model modifications to account for changes in the velocity and temperature profiles in the near-wall region. The equivalent sand grain roughness (ESGR) approach emerges as a popular metric to characterize roughness and is employed as a length scale for the RANS model. For in-flight icing, correlations were developed, accounting for both surface geometry and atmospheric conditions. Despite these research efforts, uncertainties are present in some specific conditions, where space and time roughness variations make the simulations difficult to calibrate. Research that addresses this gap could help improve ice accretion predictions.
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来源期刊
Fluids
Fluids Engineering-Mechanical Engineering
CiteScore
3.40
自引率
10.50%
发文量
326
审稿时长
12 weeks
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