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基于Smagorinsky和Vreman模型的竖通道内旋转热流场大涡模拟

DOI: 10.3969/j.issn.1006-7043.201404018

Keywords: 竖通道|旋转火焰|Smagorinsky亚格子模型|Vreman亚格子模型|大涡模拟

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Abstract:

为了确定Vreman亚格子模型对于有侧开缝的竖通道内旋转火焰热流场模拟的适用性, 基于一竖通道内旋转火焰实验场景, 分别使用基于Smagorinsky和Vreman亚格子模型的大涡模拟技术进行了模拟。通过对所得结果比较确定基于Smagorinsky亚格子模型的大涡模拟技术可以得到与实验吻合的火焰状态, 而使用Vreman亚格子模型会在一定程度上低估旋转火焰周围的粘性耗散, 从而过高地估计旋转火焰周围的切向速度, 使火焰不能保持相对稳定的旋转状态。

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