核电汽轮机高压级内非定常流动对自发凝结的影响

发布时间：2018-02-14 12:57

  本文关键词： 核电汽轮机 自发凝结 非定常流动 静叶尾迹 湿汽损失　出处：《汽轮机技术》2017年05期 　论文类型：期刊论文

【摘要】：为研究核电汽轮机高压级内非定常流动对湿蒸汽凝结流动液滴直径、压力以及湿汽损失等参数分布的影响,采用湿蒸汽非平衡凝结相变模型,对定常与非定常流动状态下湿蒸汽自发凝结流动进行三维数值分析。结果表明:非定常凝结流动趋于稳定时,各项参数的分布呈现周期性变化规律。非定常流动的动静干涉现象导致周向流场具有非均匀性,湿蒸汽级内的轴端功率下降0.266%。非定常流动过程中的静叶尾迹现象致使下游动叶通道内自发凝结的液滴直径减小。非定常凝结流动的压力位势作用使得动叶出口平均压力提高。非定常流动引起湿蒸汽凝结的热力学损失与制动损失分别升高62.27%和1.88%,疏水损失降低0.233%。
[Abstract]:For the study of nuclear steam turbine high pressure unsteady flow in the flow of droplet diameter on the pressure distribution and the effect of wet steam, wet steam loss parameters, using wet steam non-equilibrium condensation model of steady and unsteady flow of wet steam condensation flow three dimensional numerical analysis. The results showed as follows: the unsteady condensing flow tends to be stable when the distribution parameters of the present periodic change. The unsteady flow movement interference phenomenon leads to heterogeneity to the week end of wet steam flow, power down a shaft in the unsteady flow of stator wake phenomenon in the process of moving blades in the downstream channel of spontaneous condensation the droplet diameter decreases 0.266%.. The unsteady condensing flow pressure potential effect makes the rotor exit average pressure increase. The unsteady flow caused by the thermodynamic loss and brake loss of wet steam condensation were increased 62.27% and 1.88%, the loss of hydrophobicity decreased by 0.233%.

【作者单位】： 东北电力大学能源与动力工程学院;
【基金】：国家自然科学基金项目(51576036) 东北电力大学研究生创新基金资助
【分类号】：TM623.3
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本文编号：1510754