水輪機(jī)的有效水頭(外文翻譯).rar
水輪機(jī)的有效水頭(外文翻譯),包含中文翻譯和英文原文，內(nèi)容詳細(xì)完整，建議下載參考！中文：4000字英文：14300字符1、毛水頭是指的是廠房之前的上游高水位和尾水管出口的尾水位之差。2、靜態(tài)頭可以解釋為毛水頭減去所有發(fā)生蝸殼之前的損失。如果尾水管只可衡量不準(zhǔn)確，或根本不能測量，出口橫斷面和實際測量斷面的損失，應(yīng)當(dāng)加到被扣...
該文檔為壓縮文件,包含的文件列表如下:
內(nèi)容介紹
原文檔由會員 xiaowei 發(fā)布
水輪機(jī)的有效水頭(外文翻譯)
包含中文翻譯和英文原文，內(nèi)容詳細(xì)完整，建議下載參考！
中文： 4000字
英文： 14300字符
1、毛水頭是指的是廠房之前的上游高水位和尾水管出口的尾水位之差。
2、靜態(tài)頭可以解釋為毛水頭減去所有發(fā)生蝸殼之前的損失。如果尾水管只可衡量不準(zhǔn)確，或根本不能測量，出口橫斷面和實際測量斷面的損失，應(yīng)當(dāng)加到被扣除的總和里。
3、由于比能實際上不能準(zhǔn)確被定義為靜水頭，或者凈水頭，還應(yīng)當(dāng)確定，以保證轉(zhuǎn)輪效率。有效水頭定義為兩個比能源的差值，即蝸殼進(jìn)口處的比能和尾水管出口的比能之差。利用圖1我們可以寫出凈水頭的公式 ......
EFFECTIVE HEAD OF WATER TURBINE
1. The gross head is the difference between headwater elevation immediately before the station and tail-water elevation immediately after the exit from the draft tube.
Fig.1 Net or effective head
2. The static head can be derived from the gross head by subtracting all the losses occurring in the passage before the scroll case. If the elevation of water immediately below the draft tube can be gauged only inaccurately, or not at all, the losses between the exit section and the site of actual gauging shall be added to the amount of losses to be subtracted.
3. Since the energy head actually available for the turbine cannot precisely be defined by the static head either, the net head, or effective head, shall also be determined in order to check the guaranteed wheel efficiency. The effective head is defined as the difference between two energy heads, viz., between the energy head at the entrance to the scroll case and the one at the exit of the draft tube. Using notations of Fig.1 we can write for the net head ......
包含中文翻譯和英文原文，內(nèi)容詳細(xì)完整，建議下載參考！
中文： 4000字
英文： 14300字符
1、毛水頭是指的是廠房之前的上游高水位和尾水管出口的尾水位之差。
2、靜態(tài)頭可以解釋為毛水頭減去所有發(fā)生蝸殼之前的損失。如果尾水管只可衡量不準(zhǔn)確，或根本不能測量，出口橫斷面和實際測量斷面的損失，應(yīng)當(dāng)加到被扣除的總和里。
3、由于比能實際上不能準(zhǔn)確被定義為靜水頭，或者凈水頭，還應(yīng)當(dāng)確定，以保證轉(zhuǎn)輪效率。有效水頭定義為兩個比能源的差值，即蝸殼進(jìn)口處的比能和尾水管出口的比能之差。利用圖1我們可以寫出凈水頭的公式 ......
EFFECTIVE HEAD OF WATER TURBINE
1. The gross head is the difference between headwater elevation immediately before the station and tail-water elevation immediately after the exit from the draft tube.
Fig.1 Net or effective head
2. The static head can be derived from the gross head by subtracting all the losses occurring in the passage before the scroll case. If the elevation of water immediately below the draft tube can be gauged only inaccurately, or not at all, the losses between the exit section and the site of actual gauging shall be added to the amount of losses to be subtracted.
3. Since the energy head actually available for the turbine cannot precisely be defined by the static head either, the net head, or effective head, shall also be determined in order to check the guaranteed wheel efficiency. The effective head is defined as the difference between two energy heads, viz., between the energy head at the entrance to the scroll case and the one at the exit of the draft tube. Using notations of Fig.1 we can write for the net head ......
