本文主要研究内容
作者任培琦（2019）在《喷灌双向流稳流器及支管水力性能研究》一文中研究指出：结合室内试验、数值模拟和理论分析互相结合的方法,对喷灌双向流稳流器水力性能及其对喷灌支管水力性能的影响展开研究,对提高喷灌灌水质量和经济效益,具有一定的指导意义。主要研究成果如下:(1)制作2种结构参数不同的双向流稳流器,安装于喷头进口前,通过试验对比分析双向流稳流器对喷头水力性能的影响;计算这2种双向流稳流器的内部能量消耗。结果表明:安装双向流稳流器后喷头流态指数分别为0.43、0.46,相比未安装双向流稳流器时喷头的流态指数(0.55)明显降低,水力性能显著提高;2种双向流稳流器前后端的最大压力差分别为15.61%、7.5 8%,可提高喷头水力性能。(2)在使用FLUENT软件对双向流稳流器进行数值模拟时,选取标准k-ε模型,网格尺寸定为0.4mm,试验结果与数值模拟结果的误差均小于3%。数值模拟研究结果表明:分水件与双向流稳流器边壁之间的距离对流态指数的影响最大,且为为正相关关系;分水装置与水平方向的夹角对流量系数的影响显著,为负相关关系。分析流道的压力场及速度场,双向流稳流器通过其内部过水断面的突缩和突扩部位以及正、反向2股水流之间的相互影响形成的对冲和混掺产生较大的局部水头损失,消除喷头进口多余的压力,提高喷头出流的均匀性。(3)运用能量和质量守恒原理,建立了支管水力计算非线性方程组,可分析计算有与无双向流稳流器2种情况下的支管上各喷头压力和流量的分布规律。计算结果表明:安装双向流稳流器均能够大幅延长支管长度,压力差和流量差均比未安装双向流稳流器的小,因此喷灌支管上安装双向流稳流器以后能够提高灌水质量和经济效益。(4)提出了支管上部分喷头安装双向流稳流器支管水力计算非线性方程组,对比发现:在支管上部分喷头安装双向流稳流器,支管的流量差均小于支管全部安装或不安装双向流稳流器的值,表明这种形式更有利于提高灌水质量和经济效益。
Abstract
jie ge shi nei shi yan 、shu zhi mo ni he li lun fen xi hu xiang jie ge de fang fa ,dui pen guan shuang xiang liu wen liu qi shui li xing neng ji ji dui pen guan zhi guan shui li xing neng de ying xiang zhan kai yan jiu ,dui di gao pen guan guan shui zhi liang he jing ji xiao yi ,ju you yi ding de zhi dao yi yi 。zhu yao yan jiu cheng guo ru xia :(1)zhi zuo 2chong jie gou can shu bu tong de shuang xiang liu wen liu qi ,an zhuang yu pen tou jin kou qian ,tong guo shi yan dui bi fen xi shuang xiang liu wen liu qi dui pen tou shui li xing neng de ying xiang ;ji suan zhe 2chong shuang xiang liu wen liu qi de nei bu neng liang xiao hao 。jie guo biao ming :an zhuang shuang xiang liu wen liu qi hou pen tou liu tai zhi shu fen bie wei 0.43、0.46,xiang bi wei an zhuang shuang xiang liu wen liu qi shi pen tou de liu tai zhi shu (0.55)ming xian jiang di ,shui li xing neng xian zhe di gao ;2chong shuang xiang liu wen liu qi qian hou duan de zui da ya li cha fen bie wei 15.61%、7.5 8%,ke di gao pen tou shui li xing neng 。(2)zai shi yong FLUENTruan jian dui shuang xiang liu wen liu qi jin hang shu zhi mo ni shi ,shua qu biao zhun k-εmo xing ,wang ge che cun ding wei 0.4mm,shi yan jie guo yu shu zhi mo ni jie guo de wu cha jun xiao yu 3%。shu zhi mo ni yan jiu jie guo biao ming :fen shui jian yu shuang xiang liu wen liu qi bian bi zhi jian de ju li dui liu tai zhi shu de ying xiang zui da ,ju wei wei zheng xiang guan guan ji ;fen shui zhuang zhi yu shui ping fang xiang de ga jiao dui liu liang ji shu de ying xiang xian zhe ,wei fu xiang guan guan ji 。fen xi liu dao de ya li chang ji su du chang ,shuang xiang liu wen liu qi tong guo ji nei bu guo shui duan mian de tu su he tu kuo bu wei yi ji zheng 、fan xiang 2gu shui liu zhi jian de xiang hu ying xiang xing cheng de dui chong he hun can chan sheng jiao da de ju bu shui tou sun shi ,xiao chu pen tou jin kou duo yu de ya li ,di gao pen tou chu liu de jun yun xing 。(3)yun yong neng liang he zhi liang shou heng yuan li ,jian li le zhi guan shui li ji suan fei xian xing fang cheng zu ,ke fen xi ji suan you yu mo shuang xiang liu wen liu qi 2chong qing kuang xia de zhi guan shang ge pen tou ya li he liu liang de fen bu gui lv 。ji suan jie guo biao ming :an zhuang shuang xiang liu wen liu qi jun neng gou da fu yan chang zhi guan chang du ,ya li cha he liu liang cha jun bi wei an zhuang shuang xiang liu wen liu qi de xiao ,yin ci pen guan zhi guan shang an zhuang shuang xiang liu wen liu qi yi hou neng gou di gao guan shui zhi liang he jing ji xiao yi 。(4)di chu le zhi guan shang bu fen pen tou an zhuang shuang xiang liu wen liu qi zhi guan shui li ji suan fei xian xing fang cheng zu ,dui bi fa xian :zai zhi guan shang bu fen pen tou an zhuang shuang xiang liu wen liu qi ,zhi guan de liu liang cha jun xiao yu zhi guan quan bu an zhuang huo bu an zhuang shuang xiang liu wen liu qi de zhi ,biao ming zhe chong xing shi geng you li yu di gao guan shui zhi liang he jing ji xiao yi 。
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论文作者分别是来自西安理工大学的任培琦，发表于刊物西安理工大学2019-07-19论文，是一篇关于喷灌论文,双向流稳流器论文,水力性能论文,数值模拟论文,支管论文,西安理工大学2019-07-19论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自西安理工大学2019-07-19论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：喷灌论文; 双向流稳流器论文; 水力性能论文; 数值模拟论文; 支管论文; 西安理工大学2019-07-19论文;