【摘要】：為了分析軸流泵在馬鞍區(qū)工況的內(nèi)部流動(dòng)特性,對(duì)比轉(zhuǎn)速為822軸流泵的內(nèi)流場(chǎng)進(jìn)行數(shù)值模擬和分析,并對(duì)外特性進(jìn)行試驗(yàn)測(cè)試。研究結(jié)果表明:揚(yáng)程模擬值與實(shí)驗(yàn)值誤差均在1%以內(nèi),效率模擬值與實(shí)驗(yàn)值誤差均在2%以內(nèi);0.6Q_(BEP)工況葉片壓力面靜壓力分布不均勻,較最優(yōu)工況從葉片進(jìn)口到出口靜壓力的壓力梯度明顯增大,在吸力面出現(xiàn)了較大面積的低壓區(qū),0.55Q_(BEP)工況葉片壓力面靠近輪緣的高壓區(qū)較0.6Q_(BEP)工況時(shí)明顯增大,吸力面從葉片進(jìn)口到出口靜壓力逐漸增大;最優(yōu)工況下葉片壓力面和吸力面渦量螺旋度Hn分布較均勻,馬鞍區(qū)內(nèi)葉片吸力面和壓力面存在明顯的旋渦集中區(qū);馬鞍區(qū)內(nèi)葉輪進(jìn)口靠近前緣側(cè)出現(xiàn)回流,葉輪出口靠近輪轂處產(chǎn)生明顯旋渦。
[Abstract]:In order to analyze the internal flow characteristics of axial flow pump in saddle region, the internal flow field of 822 axial flow pump was numerically simulated and analyzed, and the external characteristics were tested. The results show that the error between the simulated and experimental values of the lift is less than 1%, and the error between the efficiency simulation and the experimental value is within 2%. The static pressure distribution on the blade pressure surface under 0.6 Q _ (BEP) operating conditions is not uniform. The pressure gradient from the inlet to the outlet of the blade increases obviously in the optimum working condition, and the high pressure area near the flange of the blade pressure surface near the flange increases obviously in the suction surface with a large area of low pressure area (0.55Q _ (BEP) compared with the 0.6 Q _ (BEP) condition. The vorticity helicity of the blade pressure surface and suction surface is uniform under the optimal working conditions, and there is an obvious vortex concentration area between the suction surface and the pressure surface in the saddle region. The suction surface increases gradually from the blade inlet to the outlet, and the vorticity helicity of the blade pressure surface and suction surface is uniform under the optimal working conditions. The inlet of impeller in saddle region is close to the leading edge, and the impeller outlet is close to the hub.
【作者單位】： 江蘇大學(xué)國家水泵及系統(tǒng)工程技術(shù)研究中心;江蘇大學(xué)能源與動(dòng)力工程學(xué)院;黃河水利委員會(huì)黃河水利科學(xué)研究院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51239005) 水利部技術(shù)示范項(xiàng)目(SF-201604) 江蘇省產(chǎn)學(xué)研聯(lián)合創(chuàng)新資金——前瞻性聯(lián)合研究項(xiàng)目(BY2015064-10) 江蘇省“六大人才高峰”高層次人才項(xiàng)目(GBZB-017) 江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程資助項(xiàng)目 流體及動(dòng)力機(jī)械教育部重點(diǎn)實(shí)驗(yàn)室(西華大學(xué))開放課題(szjj2016-068)
【分類號(hào)】：TV136.2
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本文編號(hào)：2232010