全非线性涡管-涡顿法:预滞留条件

IF 2.9 3区 工程技术 Q2 ENGINEERING, MECHANICAL Advances in Aerodynamics Pub Date : 2024-04-18 DOI:10.1186/s42774-023-00168-8
Jesus Carlos Pimentel-Garcia
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引用次数: 0

摘要

目前的涡管-涡顿混合方法完全基于全多醒涡晶格法(FMVLM)概念,这意味着沿着壳体每个离散元素之间的所有分离线,包括所有外部边缘,分离出具有精确涡流强度和方向的涡度。由于经典的涡旋粒子法(VPM)本身并不稳定,因为它不能随着时间的推移保留循环总量(开尔文循环定理),因此采用了一种孤立的涡旋(正则化)细丝法(VFM)来获得涡度的平流,同时通过其相应的全涡旋云来获得诱导速度场。此外,还为这种涡旋圆柱-球方法提出了一种基于涡旋体积时间变化的新型涡旋挤压/拉伸方案,以便在每个时间步(对于每个分离的涡旋元素)精确地(零残余)保持环流和涡度,同时通过核心扩散法(CSM)考虑粘性效应。
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The Full Non-linear Vortex Tube-Vorton Method: the pre-stall condition
The present hybrid vortex tube-vorton method is based entirely on the Full Multi-wake Vortex Lattice Method (FMVLM) concepts, which means detaching vorticity with precise vortex strength and orientation along all separation lines between each discretized element of a shell-body, including all external edges. Since the classic Vortex Particle Method (VPM) is unstable by itself because it does not conserve the total amount of circulation as time evolves (Kelvin’s circulation theorem), an isolated Vortex (regularized) Filament Method (VFM) approach is implemented to obtain advection of vorticity, while the induced velocity field is obtained through its corresponding full vorton cloud. Further, a novel vortex squeezing/stretching scheme for such a vortex cylinder-sphere approach is proposed based on variation in time for vortex volumes in order to precisely (zero residual) conserve both circulation and vorticity at each time step (for each detached vortex element), while the viscous effect can be accounted for via the Core Spreading Method (CSM).
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来源期刊
CiteScore
4.50
自引率
4.30%
发文量
35
审稿时长
11 weeks
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