本文選題：平面S形軸伸泵　切入點(diǎn)：數(shù)值模擬　出處：《揚(yáng)州大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：S形軸伸泵系統(tǒng)是一種流道呈S形的軸伸泵系統(tǒng)。S形軸伸泵系統(tǒng)在我國的建設(shè)應(yīng)用較早,但由于性能欠佳、效率不高,難以滿足節(jié)能等實(shí)際工程技術(shù)需要,所以應(yīng)用發(fā)展緩慢。但該泵系統(tǒng)結(jié)構(gòu)簡單,維修方便,不受泵大小制約,可用于各種尺寸的軸流泵系統(tǒng),如果能保證節(jié)能高效,應(yīng)用前景十分廣闊。近年來,一些學(xué)者研發(fā)了新型S形軸伸泵系統(tǒng),使得這種泵系統(tǒng)突破了效率不高的瓶頸,并將其應(yīng)用于工程領(lǐng)域。目前國內(nèi)外學(xué)者對S形軸伸泵系統(tǒng)的水力特性已經(jīng)有了一些研究,但還停留在對前置式或后置式單個形式的泵裝置研究上,并沒有文獻(xiàn)對前置式和后置式這兩種不同形式的泵裝置的水力特性進(jìn)行綜合比較分析。副導(dǎo)葉是一種位于導(dǎo)葉后側(cè)、處于出水流道內(nèi)部的整流裝置,它可以將出水流道中水流剩余環(huán)量進(jìn)一步回收,從而改善出水流道的內(nèi)部流態(tài),減小水力損失。但在流道中加入副導(dǎo)葉勢必會增大摩擦損失。目前,對于在裝置內(nèi)部加入副導(dǎo)葉能否提高裝置性能還缺乏深入研究。本文采用CFX軟件,分別對平面S形前置與后置軸伸泵裝置進(jìn)行數(shù)值模擬計(jì)算。根據(jù)模擬結(jié)果分析兩種泵形式的內(nèi)外特性,并進(jìn)行對比分析。在兩種泵形式的出水流道不同位置加入不同形狀的副導(dǎo)葉,觀察各個方案能否通過減小水流剩余環(huán)量來最終提高裝置性能,并通過對比各個方案的裝置性能,探索副導(dǎo)葉合適的安裝位置與形狀。數(shù)值計(jì)算結(jié)果表明:前置軸伸泵裝置在Q=3001/s時(shí)效率最高,為76.67%,對應(yīng)的揚(yáng)程為3.088m,后置軸伸泵裝置在Q=2801/s時(shí)效率最高,為76.85%,對應(yīng)的揚(yáng)程為3.448m。后置式在小流量工況時(shí)效率高于前置式,適用于偏小流量工況運(yùn)行,前置式則是在大流量工況時(shí)效率更高,適用于偏大流量工況運(yùn)行。小流量工況時(shí)后置式揚(yáng)程高于前置式,功率則略低于前置式,大流量工況時(shí)前置式揚(yáng)程較高,功率明顯高于后置式。從兩種泵形式進(jìn)出水流道水力特性的對比中可以發(fā)現(xiàn),后置式進(jìn)水流道出口的流速均勻度在全工況下高于前置式,而進(jìn)水流道水力損失則在全工況下小于前置式,進(jìn)水流道水力特性更佳。兩種泵形式出水流道水力損失在小流量工況時(shí)相近,設(shè)計(jì)及大流量工況時(shí)前置式更小。前置式導(dǎo)葉出口外周的環(huán)量在小流量工況時(shí)大于后置式,在Q達(dá)到300L/s后,兩個泵裝置的環(huán)量均趨近于0,截面上的正負(fù)環(huán)量相互抵消。從前置式出水流道中截取與后置式彎管相同長度的出水等效管,彎管與出水等效管水力損失皆在設(shè)計(jì)工況時(shí)取得最小值,彎管水力損失占出水流道水力損失的比重更大,彎管出口的環(huán)量在小流量工況時(shí)更小,大流量工況時(shí)更大。在平面S形前置軸伸泵裝置出水流道不同位置處加入矩形以及流線形副導(dǎo)葉,比較流道的水力特性及裝置的能量性能。結(jié)果表明:各方案中的副導(dǎo)葉均能有效地回收水流的剩余環(huán)量。相同位置的流線形副導(dǎo)葉方案的裝置性能優(yōu)于矩形副導(dǎo)葉方案。兩種形狀的副導(dǎo)葉方案總的趨勢是離流道進(jìn)口越遠(yuǎn),裝置性能越好。離流道進(jìn)口一定距離處加入副導(dǎo)葉可以提高裝置的性能。在平面S形后置軸伸泵裝置的彎管出口以及出水流道出口加入流線形副導(dǎo)葉后,均能有效地回收水流的剩余環(huán)量,但裝置效率均略微下降,同時(shí),副導(dǎo)葉置于彎管出口的方案效率略低于副導(dǎo)葉置于流道出口的方案。根據(jù)對副導(dǎo)葉在兩種泵形式中的嘗試可以說明,在流道中設(shè)置副導(dǎo)葉雖能有效減小水流剩余環(huán)量,但并不一定可以提高裝置效率。所以在其他形式的泵裝置中使用副導(dǎo)葉能否有效需要進(jìn)行驗(yàn)證。
[Abstract]:S shaped shaft pump system is a kind of channel is in the shape of S shaft extension pump system.S - shaft pump system in the construction of China earlier, but due to poor performance, the efficiency is not high, it is difficult to meet the actual needs of energy saving engineering technology, so the application of slow development. But the pump system has the advantages of simple structure, convenient maintenance no, the pump size constraints, can be used for various sizes of axial flow pump system, if can guarantee the energy efficiency, and has very broad application prospects. In recent years, some scholars have developed a new type of S shaped shaft pump system, the pump system to break the bottleneck of efficiency is not high, and its application in engineering field at present. The hydraulic characteristics of the domestic and foreign scholars on the S shaped shaft extension pump system has some research, but still stay in the study on the pre - or post pump type single form, and no literature on the front and rear hydraulic type these two different forms of pumping unit The characteristics were analyzed. The vice guide vane is a guide vane located in the rear side rectifier outlet inside in, it can be in the water outlet residual circulation further recovery, so as to improve the flow of internal flow, reduce the hydraulic losses. But in the channel with side guide vane is bound to increase the friction loss at present, the lack of in-depth study in the interior of the device side guide vane can improve adding device performance. This paper uses CFX software, respectively on the plane S shaped front and rear shaft pump were numerically simulated. According to the analysis of simulation results and characteristics of two kinds of pump, and comparative analysis. In the two pair of guide vane a pump outlet form different positions with different shapes, each observation scheme can reduce the flow through the residual circulation to ultimately improve device performance, and the performance of each program comparison device, To explore the installation position of vice guide vane and appropriate shape. The numerical results show that the front shaft pump device when Q=3001/s is 76.67%, the highest efficiency, the corresponding head 3.088m, rear shaft pump device when Q=2801/s is 76.85%, the highest efficiency, the corresponding head 3.448m. rear efficiency is higher than that in the small flow condition front type, suitable for small flow operation, front is efficiency in the large flow condition is higher, suitable for large flow operation. Small flow condition when the rear head is higher than the front, power is slightly lower than the front, at large flow condition of front power was significantly higher than that of the high lift, rear comparing import hydraulic characteristics from two kinds of pump form can be found in the rear inlet exit velocity uniformity in all conditions is higher than the front, and the water hydraulic loss is less than in full working condition Front type, hydraulic characteristics of inlet passage is better. Two kinds of pump hydraulic loss of discharge passage in the vicinity of the small flow condition, and design at large flow condition in front of smaller. The circulation of front guide vane outlet peripheral is greater than the rear in the small flow condition, the Q reached 300L/s, two circulation pump the devices are close to 0, positive and negative circulation offset section. The water equivalent of the passage in the interception from the front and rear pipe of the same length tube, pipe and water pipe hydraulic losses are equivalent in the design condition has a minimum value, the proportion of water pipe hydraulic loss of hydraulic loss is larger, ring the amount of export pipe in the small flow condition is smaller, more at large flow condition. With rectangular and streamlined side guide vanes in the plane S shaped front shaft extension at different positions of the pump outlet device, hydraulic characteristics and flow of the device can The amount of the performance. The results show that the residual circulation guide in the schemes can effectively recover the leaves with water. The same position of the streamline shaped side guide device is better than rectangular side stators scheme. Two kinds of leaf shape guide leaf total program is the trend of the farther away from the inlet, the better the performance of device from the inlet at a certain distance to the secondary vane can improve the performance of the device. In plane S pump shaft bending shape rear outlet and outlet outlet join streamline vice guide vane, residual circulation can effectively recycle water, but the device efficiency was slightly lower, at the same time, the efficiency of the proposed schemes the vice guide vane should be slightly lower than the side bend outlet guide vane outlet in the scheme. According to that attempt to side guide vanes in the two pumps in the form of side guide vane can effectively reduce the flow quantity of the remaining ring set in the port, but not necessarily can Improve the efficiency of the device. Therefore, it is necessary to verify the use of the secondary guide leaves in other types of pump devices.

【學(xué)位授予單位】：揚(yáng)州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV136.2

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王林鎖,陳松山,葛強(qiáng),陳玉明;泵及泵裝置效率預(yù)測方法研究[J];揚(yáng)州大學(xué)學(xué)報(bào)(自然科學(xué)版);2001年02期

2 王林鎖,陳松山,陸偉剛,陳玉明,葛強(qiáng);新型雙向平蝸殼流通泵裝置特性試驗(yàn)研究[J];揚(yáng)州大學(xué)學(xué)報(bào)(自然科學(xué)版);2000年04期

3 陳松山;嚴(yán)登豐;葛強(qiáng);周正富;羅惕乾;;泵及泵裝置效率換算方法[J];農(nóng)業(yè)機(jī)械學(xué)報(bào);2006年11期

4 潘光星;何萍;陳松山;何鐘寧;周正富;;泵段與泵裝置能量特性曲線關(guān)系探討[J];揚(yáng)州大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年04期

5 李彥軍;黃良勇;袁壽其;嚴(yán)登豐;;大型泵與泵裝置效率特性預(yù)測理論分析[J];農(nóng)業(yè)機(jī)械學(xué)報(bào);2009年01期

6 陳松山;葛強(qiáng);周正富;嚴(yán)登豐;;泵裝置模型試驗(yàn)?zāi)M方法分析[J];水力發(fā)電學(xué)報(bào);2006年05期

7 成立;劉超;;低揚(yáng)程泵裝置流動特性及水力性能研究進(jìn)展[J];水利水電科技進(jìn)展;2008年04期

8 崔健;張劍;徐靜;章啟兵;;計(jì)算流體動力學(xué)在泵裝置優(yōu)化選型設(shè)計(jì)中的應(yīng)用[J];治淮;2010年08期

9 鄢碧鵬;劉超;湯方平;;模糊判斷在低揚(yáng)程泵裝置選型上的應(yīng)用[J];揚(yáng)州大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年04期

10 成立;劉超;B.P.M. van Esch;車曉紅;;低揚(yáng)程泵裝置水力損失及水力設(shè)計(jì)流程分析[J];南水北調(diào)與水利科技;2008年06期

相關(guān)會議論文 前3條

1 陳松山;葛強(qiáng);周正富;嚴(yán)登豐;;泵裝置模型試驗(yàn)?zāi)M方法分析[A];2009全國大型泵站更新改造研討暨新技術(shù)、新產(chǎn)品交流大會論文集[C];2009年

2 李彥軍;嚴(yán)登豐;袁壽其;;泵及泵裝置效率換算方法研究[A];農(nóng)業(yè)機(jī)械化與新農(nóng)村建設(shè)——中國農(nóng)業(yè)機(jī)械學(xué)會2006年學(xué)術(shù)年會論文集（上冊）[C];2006年

3 陳松山;葛強(qiáng);嚴(yán)登豐;周正富;屈磊飛;;大型泵站豎井進(jìn)水流道數(shù)值模擬與泵裝置特性試驗(yàn)研究[A];2009全國大型泵站更新改造研討暨新技術(shù)、新產(chǎn)品交流大會論文集[C];2009年

相關(guān)碩士學(xué)位論文 前8條

1 白炳國;江都泵站泵裝置魚類通過性計(jì)算與分析[D];揚(yáng)州大學(xué);2016年

2 徐磊;平面S形軸伸泵裝置水力特性[D];揚(yáng)州大學(xué);2017年

3 蔣麗君;泵裝置優(yōu)化設(shè)計(jì)研究[D];揚(yáng)州大學(xué);2004年

4 姜楠;雙向?qū)ΨQ葉輪豎井貫流式泵裝置內(nèi)流動數(shù)值模擬[D];揚(yáng)州大學(xué);2010年

5 陳阿萍;臥式前軸伸泵裝置的數(shù)值模擬及模型試驗(yàn)研究[D];揚(yáng)州大學(xué);2007年

6 徐磊;斜式軸伸泵裝置水力特性及優(yōu)化設(shè)計(jì)研究[D];揚(yáng)州大學(xué);2009年

7 甄峰;烏江泵站水力模型選擇及泵裝置模型試驗(yàn)研究[D];揚(yáng)州大學(xué);2013年

8 周慶連;立式潛水泵裝置內(nèi)部流動和性能預(yù)測[D];揚(yáng)州大學(xué);2014年

，

本文編號：1566876