【摘要】：重點(diǎn)研究高速離心壓氣機(jī)葉輪與機(jī)匣間的間隙流動(dòng)及其溫度分布。研究將離心壓氣機(jī)簡(jiǎn)化為高速轉(zhuǎn)動(dòng)圓盤,搭建了相關(guān)實(shí)驗(yàn)平臺(tái),并開(kāi)展了相應(yīng)的數(shù)值模擬研究。通過(guò)改變轉(zhuǎn)動(dòng)圓盤的轉(zhuǎn)速和軸向進(jìn)入的冷卻流的流量,研究了轉(zhuǎn)速和流量對(duì)于間隙內(nèi)溫度和速度分布的影響。結(jié)果顯示,轉(zhuǎn)速是影響溫度變化的最主要因素,轉(zhuǎn)速越大,溫度越高;同等幅度的流量變化對(duì)溫度的影響則較小。研究發(fā)現(xiàn),在實(shí)驗(yàn)和模擬對(duì)應(yīng)的大雷諾數(shù)條件下,無(wú)量綱的速度分布基本不受到圓盤轉(zhuǎn)速、冷卻流量和溫度場(chǎng)的影響。
[Abstract]:The gap flow and temperature distribution between impeller and casing of high speed centrifugal compressor are studied. The centrifugal compressor is simplified as a high speed rotating disk, and a related experimental platform is set up, and the corresponding numerical simulation research is carried out. The effects of rotation speed and flow rate on the temperature and velocity distribution in the gap were studied by changing the rotational speed of the rotating disc and the flow rate of the axial flow. The results show that the rotational speed is the most important factor affecting the temperature change, the higher the rotational speed is, the higher the temperature is, and the less the change of flow rate of the same amplitude is to the temperature. It is found that the dimensionless velocity distribution is not affected by the disk speed, cooling flow rate and temperature field under the experimental and simulated conditions of large Reynolds number.
【作者單位】： 清華大學(xué)航天航空學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(11272183)資助項(xiàng)目
【分類號(hào)】：O357.5
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本文編號(hào)：2283755