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首页> 外文期刊>High temperature: English translation of teplofizika vysokikh temperatur >Numerical simulation of heat exchange and turbulent fluid flow in a pipe under supercritical pressure with allowance for the joint effect of density pulsations and thermal acceleration on turbulent transfer
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Numerical simulation of heat exchange and turbulent fluid flow in a pipe under supercritical pressure with allowance for the joint effect of density pulsations and thermal acceleration on turbulent transfer

机译：考虑到密度脉动和热加速度对湍流传递的联合作用，在超临界压力下管道中的热交换和湍流流动的数值模拟

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摘要

Regimes of deteriorated (with peaks of the wall temperature) heat release under a turbulent flow of carbon dioxide in a round pipe under supercritical pressure are calculated. The calculation is based on a system of motion, continuity, and energy equations written in the narrow channel approximation. The buoyancy force was neglected. A model of turbulent stress and turbulent thermal flow with allowance for the joint influence of density pulsations and thermal acceleration is proposed. The calculation results for the variation in the wall temperature and resistance coefficients along the well agree with available experimental data. An explanation for the causes of the appearance of a peak in the wall temperature distribution along the pipe in the region where the fluid temperature is close to the pseudocritical temperature is presented.
机译：计算了在超临界压力下在圆管中二氧化碳湍流下放热恶化的状态（壁温达到峰值）。该计算基于以窄通道近似形式编写的运动，连续性和能量方程式。浮力被忽略了。提出了考虑密度脉动和热加速度联合影响的湍流应力和湍流热流模型。沿井壁温度和电阻系数变化的计算结果与可用的实验数据一致。给出了在流体温度接近伪临界温度的区域中沿管壁温度分布出现峰值的原因的解释。

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