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Validation of CE/SE Scheme in Low Mach Number Direct Aeroacoustic Simulation

机译:低马赫数直接航空声学模拟中CE / SE方案的验证

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摘要

The space-time conservation element and solution element (CE/SE) scheme has caught many attention in aeroacoustic research community as an alternative numerical strategy for direct aeroacoustic simulation (DAS). As a result of its strict conversation of flow flux in both space and time, the low-order CE/SE scheme possesses excellent non-dissipative characteristics, expedient in calculating low Mach number DAS which requires uniform numerical accuracy to resolve the widely disparate flow and acoustic scales of the problem. In this paper, an attempt of validating a simplified Courant Number Insensitive CE/SE scheme using carefully selected aeroacoustic benchmark problems is reported. Excellent agreement with the benchmark results obtained firmly establishes that CE/SE scheme is a viable scheme for resolving the nonlinear physics of low Mach number aeroacoustic problems.
机译:时空守恒元素和解元素(CE / SE)方案作为直接航空声仿真(DAS)的替代数值策略,已在航空声研究界引起了广泛关注。由于在空间和时间两方面都严格限制了通量,因此低阶CE / SE方案具有出色的非耗散特性,有利于计算低马赫数DAS,这需要统一的数值精度来解决宽泛的流和问题的音阶。在本文中,报告了尝试使用精心选择的航空声学基准问题验证简化的库仑数不敏感的CE / SE方案。与基准测试结果的极好的一致性坚定地证明,CE / SE方案是解决低马赫数气动声学问题的非线性物理学的可行方案。

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