本文選題：離心風機 + 數(shù)值模擬��； 參考：《哈爾濱工程大學》2013年碩士論文

【摘要】：離心風機是一種重要的流體機械，是日常生產(chǎn)、生活中必不可少的一種通風設備。如何提高風機效率、擴大其工況范圍也是節(jié)能減排的重要研究方向之一。本文將通過數(shù)值仿真計算的方法，離心風機的氣動性能進行模擬和研究，以提高其工作效率，為新型離心風機的研發(fā)提供參考。 本文主要以9-26-14.5D單級離心風機為研究對象，利用Pro/ENGINEER Wildfire5.0軟件進行建模，采用Gambit軟件劃分網(wǎng)格，使用FLUENT13.0件進行數(shù)值仿真計算并與實驗測量數(shù)值進行對比，，找出適合的數(shù)值模擬方法。在掌握合理的數(shù)值模擬方法基礎上，對風機葉片進行優(yōu)化設計，并對改進后的風機重新進行數(shù)值模擬計算和實驗驗證。 利用現(xiàn)有實驗平臺對離心風機進行性能測試，針對離心風機軸功率無法直接測得的問題，通過測得電機工作電流及電壓來間接計算出風機的軸功率，并獲得離心風機的工作特性曲線。 根據(jù)離心風機內(nèi)部流動情況，對離心風機進行若干工況的數(shù)值模擬，較全面的了解離心風機流量改變對其性能參數(shù)的影響。以提高離心風機效率為目的對風機葉片進行優(yōu)化，雖然優(yōu)化后數(shù)值仿真與實驗結果仍有一定的偏差，但改進前后的壓力、流量、功率等變化趨勢相同。 對不同離心風機葉輪進口側(cè)蓋板的不平整情況進行了數(shù)值仿真模擬與分析。當葉輪進口側(cè)蓋板有凹陷時，對離心風機性能影響較大，不平整的位置越靠近葉輪出口，風機的效率下降的越多，當不平整位置靠近葉輪進口時，反而有可能使風機的流量與出口壓力有一定提升，但效率還是會下降。對于離心風機葉輪進口側(cè)蓋板凸出的情況，在位置和不平整情況基本相同時，凸出情況對離心風機性能的影響要遠小于凹陷情況。
[Abstract]:Centrifugal fan is an important fluid machinery, it is a necessary ventilation equipment in daily production and daily life.How to improve fan efficiency and expand its operating range is also one of the important research directions of energy saving and emission reduction.In this paper, the aerodynamic performance of centrifugal fan is simulated and studied by the method of numerical simulation, in order to improve its working efficiency and provide reference for the research and development of new centrifugal fan.This paper mainly takes 9-26-14.5D single-stage centrifugal fan as the research object, uses Pro/ENGINEER Wildfire5.0 software to model, uses Gambit software to divide the grid, uses FLUENT13.0 to carry on the numerical simulation calculation and compares with the experimental measurement value, and finds out the suitable numerical simulation method.On the basis of the reasonable numerical simulation method, the optimal design of the fan blade is carried out, and the improved fan is simulated again and verified by experiments.The performance of centrifugal fan is tested by using the existing experimental platform. Aiming at the problem that the shaft power of centrifugal fan can not be measured directly, the shaft power of fan is calculated indirectly by measuring the working current and voltage of the motor.The working characteristic curve of centrifugal fan is obtained.According to the internal flow situation of centrifugal fan, the numerical simulation of centrifugal fan under several working conditions is carried out, and the influence of flow rate change of centrifugal fan on its performance parameters is fully understood.In order to improve the efficiency of centrifugal fan, although there is still some deviation between the numerical simulation and the experimental results, the change trend of pressure, flow rate and power before and after the improvement is the same.The unevenness of the inlet side cover plate of different centrifugal fan impellers is simulated and analyzed numerically.When the inlet side cover plate of impeller has depression, the performance of centrifugal fan is greatly affected. The more unleveled position is near the impeller outlet, the more the efficiency of fan decreases, and when the unleveled position is near the impeller inlet,On the contrary, it is possible to increase the flow rate and outlet pressure of the fan, but the efficiency will decrease.When the position and unevenness are basically the same, the effect of protruding on the performance of centrifugal fan is much smaller than that of sag.
【學位授予單位】：哈爾濱工程大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TH432

【參考文獻】

相關期刊論文 前10條

1 唐新興,安保明,朱偉明;GL03型機車過濾器的性能分析[J];電力機車與城軌車輛;2004年03期

2 李超,張瑞成;“可控渦”法設計離心葉輪的應用研究[J];動力工程;2003年06期

3 李超,伍繼浩;離心通風機整機損失數(shù)學模型的研究及優(yōu)化[J];風機技術;2000年04期

4 張莉,陳漢平,徐忠;離心壓縮機葉輪內(nèi)部流場的準三元迭代數(shù)值分析[J];風機技術;2000年05期

5 彭鑫,蔡兆麟;大型離心通風機葉輪的三維應力計算[J];風機技術;2001年02期

6 魏文平,蔡兆麟;空調(diào)器多翼離心通風機整機定常流動的數(shù)值模擬[J];風機技術;2004年03期

7 徐長棱,毛義軍,李凱 ,譚佳建;離心通風機整機三維流場的數(shù)值模擬[J];風機技術;2005年05期

8 李意民;離心葉輪內(nèi)三維分離流態(tài)的拓撲分析[J];工程熱物理學報;2000年03期

9 王松嶺;雷泳;李春曦;黃興;;電廠離心風機容積損失的數(shù)值分析[J];華北電力大學學報;2006年01期

10 朱宏磊;李意民;孫更生;賈利紅;;后蓋板傾角對離心式風機磨損影響的試驗研究[J];礦山機械;2005年12期

本文編號：1769709