泵站钟形进水流道吸水室后壁形状的研究

发布时间：2018-04-09 06:03

本文选题：泵装置　切入点：钟形进水流道　出处：《南水北调与水利科技》2017年05期

【摘要】：基于三维不可压缩流体的雷诺平均N-S方程和RNGk-ε紊流模型,对矩形、半圆形和"ω"吸水室后壁形状的钟形进水流道泵装置进行了三维紊流数值模拟,并分析了钟形进水流道后壁形状对泵装置水力特性的影响。相同流量下,"ω"形吸水室进水流道流线分布最规则,漩涡比其他形状的进水流道小,"ω"形吸水室进水流道水力损失比矩形吸水室进水流道小1cm;出口断面的流速均匀度达到93%,比矩形和半圆形吸水室进水流道高约2个百分点;出口断面速度加权平均角度达到83.5°,比矩形吸水室进水流道高0.6°,比半圆形吸水室进水流道高0.2°;泵装置运行高效区流量范围比半圆形的拓宽了7.3%,比矩形的拓宽了30%。该研究对于完善泵站钟型进水流道吸水室优化设计具有一定意义。
[Abstract]:The Reynolds averaged N-S equation and RNGk- turbulent model, the three-dimensional incompressible fluid based on rectangular, semicircular and "Omega" suction chamber after the bell wall shape of the inlet pump device of three-dimensional numerical simulation of turbulent flow, and analyzes the influence of wall shape on the force characteristics of the water pump device bell inlet passage. The same flow under the "Omega shaped suction chamber inlet streamline distribution rules, other than the shape of the vortex flow in the inlet, Omega shaped suction chamber inlet hydraulic loss than the rectangular chamber inlet 1cm outlet section; the velocity uniformity degree reached 93%, compared with rectangular and semi-circular suction chamber inlet height of about 2 percentage points; the outlet velocity weighted average angle is 83.5 degrees, than the rectangular chamber inlet high 0.6 degrees, than the semi circular suction chamber inlet 0.2 degrees; pump efficient operation flow broaden the scope of more than 7.3% semicircular, than It is of great significance to improve the optimization design of the suction chamber of the bell type inlet channel of the pump station by the widening of the rectangle 30%..

【作者单位】：扬州大学水利与能源动力工程学院;
【基金】：“十二五”国家科技支撑计划重点项目(22015BAD20B01) 江苏高校优势学科建设工程资助项目~~
【分类号】：TV136.2;TV675

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