【摘要】：能源是經(jīng)濟(jì)的命脈，在社會可持續(xù)發(fā)展中起著舉足輕重的作用。然而，能源的消耗卻在持續(xù)增長，不可再生資源也日益枯竭。為緩解這一問題，許多學(xué)者陸續(xù)對節(jié)能方式和方法進(jìn)行了研究和開發(fā)。生活工作中浪費(fèi)掉很多水動力，其實(shí)這些水動力可以通過微型的水輪機(jī)進(jìn)行發(fā)電，作為一些耗電設(shè)備的電源充電器，這樣就可以達(dá)到節(jié)能的目的。 本文主要是根據(jù)水輪機(jī)的工作原理和傳統(tǒng)雙擊式水輪機(jī)過流部件的設(shè)計(jì)方法，通過solidworks建立微型雙擊式水輪機(jī)的三維模型。由于現(xiàn)有條件的限制，在對三維模型進(jìn)行數(shù)值模擬之前，利用gambit對微型雙擊式水輪機(jī)進(jìn)行二維制圖，先對二維模型進(jìn)行數(shù)值模擬。在二維模擬的基礎(chǔ)之上，對三維模型進(jìn)行數(shù)值模擬。在運(yùn)用fluent對二維模型進(jìn)行數(shù)值模擬時(shí)，主要通過改變水輪機(jī)的部分參數(shù)和結(jié)構(gòu)來研究該微型雙擊式水輪機(jī)的性能。在二維的研究基礎(chǔ)之上，為進(jìn)一步驗(yàn)證微型雙擊式水輪機(jī)的性能，在本文最后，對建立的三維微型雙擊式水輪機(jī)的幾何模型進(jìn)行數(shù)值模擬。對三維模型進(jìn)行數(shù)值模擬時(shí)，采用同樣的邊界條件設(shè)置。本文經(jīng)過大量的工作，通過模擬計(jì)算可以得出： （1）通過改變微型雙擊式水輪機(jī)的入口總壓，得到水輪機(jī)的效率隨入口壓力的變化，并說明該微型雙擊式水輪機(jī)適合在40000Pa-120000Pa壓力下工作。 （2）通過改變微型雙擊式水輪機(jī)的葉片個數(shù)，可以得到水輪機(jī)的效率隨葉片個數(shù)的變化情況，以及本文設(shè)定的微型雙擊式水輪機(jī)在葉片個數(shù)為18時(shí)，水輪機(jī)的效率達(dá)到最優(yōu)。 （3）通過改變水輪機(jī)的葉型，，得出水輪機(jī)效率相對葉片類型的變化趨勢。在設(shè)計(jì)中可以探索通過水輪機(jī)的葉片類型，增加水輪機(jī)的效率。 （4）改變微型雙擊式水輪機(jī)的轉(zhuǎn)速，得出該微型雙擊式水輪機(jī)的轉(zhuǎn)速特性曲線，以及最佳轉(zhuǎn)速。 （5）本微型雙擊式水輪機(jī)相比實(shí)際研究應(yīng)用中的水電雙擊式水輪機(jī)的效率要低一些，主要是因?yàn)閿?shù)值模擬的局限性、幾何模型結(jié)構(gòu)等一些因數(shù)影響。
[Abstract]:Energy is the lifeblood of economy and plays an important role in the sustainable development of society. However, energy consumption continues to grow and non-renewable resources are increasingly depleted. In order to alleviate this problem, many scholars have carried on the research and the development to the energy saving way and the method one after another. Life and work waste a lot of hydrodynamic power, in fact, these hydrodynamic power can be generated through a miniature turbine, as a power charger for some power consumption equipment, so as to achieve the purpose of energy saving. According to the working principle of the turbine and the design method of the traditional overflowing parts of the double-hammer turbine, the three-dimensional model of the micro-double-hammer turbine is established by solidworks in this paper. Due to the limitation of the existing conditions, before the 3D model is simulated, gambit is used to carry out the two-dimensional mapping of the micro-double-click turbine, and the two-dimensional model is numerically simulated. On the basis of two-dimensional simulation, the three-dimensional model is numerically simulated. In the numerical simulation of the two-dimensional model with fluent, the performance of the micro-double-tap turbine is studied by changing some parameters and structure of the turbine. Based on the two-dimensional research, in order to further verify the performance of the micro-double-hammer turbine, in the end of this paper, the geometric model of the three-dimensional micro-double-hammer turbine is numerically simulated. The same boundary conditions are used in the numerical simulation of the three-dimensional model. After a lot of work and simulation, the following conclusions can be obtained: (1) by changing the total inlet pressure of the micro-double-tap turbine, the efficiency of the turbine varies with the inlet pressure. It is also shown that the micro-double-tap turbine is suitable for working under 40000Pa-120000Pa pressure. (2) by changing the number of blades of the micro-double-tap turbine, the variation of turbine efficiency with the number of blades can be obtained. The turbine efficiency is optimized when the number of blades is 18:00. (3) the variation trend of turbine efficiency relative to blade type is obtained by changing the blade shape of the turbine. In the design, it can be explored to increase the efficiency of the turbine through the blade type of the turbine. (4) changing the speed of the micro-double-tap turbine, the speed characteristic curve of the micro-double-tap turbine can be obtained. (5) the efficiency of the micro double-hammer turbine is lower than that of the practical application, mainly because of the limitation of numerical simulation and the structure of geometric model.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TK735.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張梁,吳偉章,吳玉林,陶星明,劉樹紅;混流式水輪機(jī)壓力脈動預(yù)測[J];大電機(jī)技術(shù);2002年05期

2 劉宇,吳偉章,吳玉林,陶星明,劉樹紅,張梁;混流式模型水輪機(jī)全流道三維定常湍流計(jì)算[J];大電機(jī)技術(shù);2003年03期

3 楊琳;陳乃祥;樊紅剛;;水泵水輪機(jī)全流道雙向流動三維數(shù)值模擬與性能預(yù)估[J];工程力學(xué);2006年05期

4 吳玉林，韓海，曹樹良;水輪機(jī)轉(zhuǎn)輪內(nèi)全三維紊流計(jì)算及效率預(yù)估[J];工程熱物理學(xué)報(bào);1996年03期

5 彭澤元;雙擊式水輪機(jī)的技術(shù)發(fā)展[J];動力工程;1992年04期

6 韓鳳琴,久保田喬,劉潔;數(shù)值模擬沖擊式水輪機(jī)內(nèi)部非定常流動[J];華中理工大學(xué)學(xué)報(bào);2000年11期

7 張雙全;符建平;段開林;萬鵬;;三峽水輪機(jī)尾水管渦帶的CFD數(shù)值模擬[J];華中科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年07期

8 ;Numerical simulation of pressure fluctuation in Kaplan turbine[J];Science in China(Series E:Technological Sciences);2008年08期

9 侯樹強(qiáng),王燦星,林建忠;葉輪機(jī)械內(nèi)部流場數(shù)值模擬研究綜述[J];流體機(jī)械;2005年05期

10 符杰;宋文武;周敏;楊佐衛(wèi);姚文革;;多噴嘴沖擊式水輪機(jī)內(nèi)部流動研究[J];農(nóng)業(yè)機(jī)械學(xué)報(bào);2008年10期

本文編號：2172386