stall n. 1.畜舍的一個(gè)隔欄;馬房,牛棚。 2.(房舍內(nèi)的)分隔小間;〔美國(guó)〕汽車(chē)間。 3.售貨攤;棚店;售品陳列臺(tái)。 4.〔英國(guó)〕〔常 pl.〕(戲院樓下)正廳前座(觀眾)。 5.(教堂里的)牧師席;教徒們的長(zhǎng)排坐椅。 6.【礦物】礦坑,采煤道;泥窯;敞式礦砂焙燒爐。 7.【航空】失速;失舉。 8.橡皮手腳指護(hù)套。 9.小分隔間 (a shower stall 淋浴隔間)。 vt. 1.把…關(guān)進(jìn)馬房[牛欄];把(牲畜)關(guān)著養(yǎng)肥。 2.把(畜舍)分成小格。 3.〔美國(guó)〕使(馬、車(chē))陷入泥中[雪中],使進(jìn)退不得,(使機(jī)車(chē)等)停頓,停止。 4.【航空】使失速。 5.〔古語(yǔ)〕授予(職位)。 vi. 1.住在畜舍內(nèi)。 2.陷入泥中[雪中]。 3.【航空】失速;失舉。 4.(發(fā)動(dòng)機(jī))發(fā)生障礙,停止,停頓。 a stalled ox 關(guān)著養(yǎng)肥了的牛。 Heavy rain stalled traffic. 大雨使交通停頓。 stall down landing 【航空】失速降落。 n. 〔美俚〕 1.口實(shí),借口;拖延,搪塞,敷衍;欺騙辦法。 2.(盜賊或扒手的)同黨。 vi.,vt. 1.欺騙;逃避。 2.拖延;支吾,敷衍。 stall for a while 暫時(shí)拖一下。 stalling tactics 緩兵之計(jì)。 He knows how to stall off the applicants for the houses. 他很曉得怎樣敷衍打發(fā)申請(qǐng)住房的人。
Unique rotating stall heat - regulating function 獨(dú)特的旋轉(zhuǎn)檔位式熱蓋調(diào)節(jié)功能。
Experimental study of small perturbation induced rotating stall in axial flow compressor 軸流壓氣機(jī)小擾動(dòng)誘發(fā)旋轉(zhuǎn)失速的試驗(yàn)研究
Experimental study shows : it was able to distinguish between rotating stall and the inlet vortex . , 實(shí)驗(yàn)表明,旋轉(zhuǎn)失速和進(jìn)口渦流能夠區(qū)分,且區(qū)域界限分離明顯。
So under some situations , for example at the point of inception of surge or rotating stall , wet compression can be used to vanish surge and rotating stall , which will extend compressor steady operation region 在一定的條件下,如在系統(tǒng)剛發(fā)生喘振或旋轉(zhuǎn)失速的時(shí)候,噴水濕壓縮可以用來(lái)消除喘振或旋轉(zhuǎn)失速,這有利于增大壓氣機(jī)的穩(wěn)定運(yùn)行范圍。
This model can be used to reveal system transient responses during surge / rotating stall and effects of wet compression on these transient responses . simulation results show that wet compression can affect system performance because pressure output is higher and operating point is changed when wet compression is used 該模型和初步的仿真結(jié)果表明濕壓縮對(duì)壓縮系統(tǒng)的影響,表現(xiàn)為濕壓縮(在消耗的壓縮功相同的情況下)使壓縮系統(tǒng)的運(yùn)行點(diǎn)發(fā)生了改變。
Abstract : concerning the models for discribing aerodynamic stability of axial flow compressor , the original model is one - dimensional , and it is reasonable for the onset of surge only . for the onset of rotating stall , there are just some two - dimensional models at published literatures . a three - dimensional aerodynamic of compressor has been presented in this paper . an aerodynamic stability model concerning radial disturbance of compressor is presented . the calculated results show that the occurrence of radial disturbance is related to the axial velocity disturbance , which has important effect on aerodynamic stability of compressor . the position of onset of stall , in blade tip or hub , is dependent upon the characteristics of blade element . the comparisons of calculated results predicted by 2d and 3d aerodynamic stability model have also been made in this paper 文摘:軸流壓氣機(jī)的氣動(dòng)穩(wěn)定性模型,最初為一維模型,僅適用于描述喘振發(fā)作.對(duì)于旋轉(zhuǎn)失速發(fā)作,在公開(kāi)文獻(xiàn)中有一些二維模型發(fā)表.本文提出了一類(lèi)考慮壓氣機(jī)徑向擾動(dòng)對(duì)失速影響的新的氣動(dòng)穩(wěn)定性模型.計(jì)算結(jié)果表明壓氣機(jī)的軸向擾動(dòng)往往隨著徑向擾動(dòng)的產(chǎn)生,徑向擾動(dòng)的強(qiáng)度影響壓氣機(jī)的氣動(dòng)穩(wěn)定性,在葉尖還是葉根首先產(chǎn)生失速與壓氣機(jī)基元葉柵特性密切相關(guān).本文對(duì)軸流壓氣機(jī)二維和三維氣動(dòng)穩(wěn)定性模型的計(jì)算結(jié)果進(jìn)行了對(duì)比分析
Simulation results show that the surge line moved up - left relative to the original one and surge margin became larger when wet compression is used , which means wet compression can extend steady - operation regions of compressors and the si a - 02 gas turbine . at last , based on the moore - greitzer model surge and rotating stall of a compression system with wet compression is modeled with consideration of inlet evaporative cooling and compressor pressure rise when wet compression is used 哈爾濱工程大學(xué)博士學(xué)位論文最后,本文在壓縮系統(tǒng)moors grei上zer模型的基礎(chǔ)上,考慮進(jìn)口蒸發(fā)冷卻的作用和壓氣機(jī)濕壓縮過(guò)程的作用,推導(dǎo)出了濕壓縮系統(tǒng)喘振和旋轉(zhuǎn)失速的統(tǒng)一模型,該模型可以模擬系統(tǒng)發(fā)生喘振和旋轉(zhuǎn)失速時(shí)的瞬態(tài)響應(yīng)以及噴水濕壓縮對(duì)系統(tǒng)瞬態(tài)響應(yīng)的影響。
Concerning the models for discribing aerodynamic stability of axial flow compressor , the original model is one - dimensional , and it is reasonable for the onset of surge only . for the onset of rotating stall , there are just some two - dimensional models at published literatures . a three - dimensional aerodynamic of compressor has been presented in this paper . an aerodynamic stability model concerning radial disturbance of compressor is presented . the calculated results show that the occurrence of radial disturbance is related to the axial velocity disturbance , which has important effect on aerodynamic stability of compressor . the position of onset of stall , in blade tip or hub , is dependent upon the characteristics of blade element . the comparisons of calculated results predicted by 2d and 3d aerodynamic stability model have also been made in this paper 軸流壓氣機(jī)的氣動(dòng)穩(wěn)定性模型,最初為一維模型,僅適用于描述喘振發(fā)作.對(duì)于旋轉(zhuǎn)失速發(fā)作,在公開(kāi)文獻(xiàn)中有一些二維模型發(fā)表.本文提出了一類(lèi)考慮壓氣機(jī)徑向擾動(dòng)對(duì)失速影響的新的氣動(dòng)穩(wěn)定性模型.計(jì)算結(jié)果表明壓氣機(jī)的軸向擾動(dòng)往往隨著徑向擾動(dòng)的產(chǎn)生,徑向擾動(dòng)的強(qiáng)度影響壓氣機(jī)的氣動(dòng)穩(wěn)定性,在葉尖還是葉根首先產(chǎn)生失速與壓氣機(jī)基元葉柵特性密切相關(guān).本文對(duì)軸流壓氣機(jī)二維和三維氣動(dòng)穩(wěn)定性模型的計(jì)算結(jié)果進(jìn)行了對(duì)比分析
In t his p aper r otating s tall a nd t he inlet v ortex in c entrifugal fans with inlet v ane control has been studied in laboratory . the harmonic wavelet is firstly used for time - frequency analysis and feature extraction of pulsation amplitude and frequency and development of rotating stall and inlet vortex . the development rule of rotating stall and inlet vortex and the effect to fans performance from the two has been found 文中對(duì)采用入口導(dǎo)流器調(diào)節(jié)的離心通風(fēng)機(jī)的旋轉(zhuǎn)失速和進(jìn)口渦流問(wèn)題進(jìn)行了實(shí)驗(yàn)研究,并借助諧波小波對(duì)旋轉(zhuǎn)失速和進(jìn)口渦流的頻率、幅值特性及動(dòng)態(tài)過(guò)程進(jìn)行了時(shí)頻分析和特征提取,揭示了旋轉(zhuǎn)失速和進(jìn)口渦流發(fā)展的規(guī)律及二者對(duì)風(fēng)機(jī)性能的影響。