【作者】 吴勇；

【导师】 延耀兴；

【作者基本信息】 太原理工大学 ， 水文与水资源， 2005， 硕士

【摘要】 在过去的几十年中,人们对单股射流的流动作了大量的实验研究,取得了丰富的资料,而对多股射流流动特性的研究确不多见。近年来,随着工业的发展,多股射流的应用愈来愈广,在许多工程技术部门中,如航空航天方面的火箭、喷气式飞机,动力方面的蒸汽泵、汽轮、锅炉、燃烧室,化工方面的混合设备,自动控制方面的射流元件,以及射流切割、水力采掘、民用消防、农业喷灌和通风空调等中都有大量的射流问题,水利工程中的水工建筑物泄流和下游水流的衔接和消能等许多流动属于射流类型。在环境工程中,排污、排热、排气的近区扩散分析,则是射流理论直接应用的一种重要理论。因而,对多股射流的流动特性作比较深入的研究就愈来愈显得必要了 本课题在无限空间自由紊动射流的基础上,对有限空间不可压缩单股和多股射流进行了理论分析和试验研究。试验包括两部分: 1、单股圆形紊动射流更多还原

【Abstract】 Through the past decades, people have done a great deal of experiment research on single jet and have got abundant datum, while have not done much on the flow characteristic of multiple jets. In recent years, with the development of industry, the appliance of multiple jets is more and more, in many engineering technique branches all have many jets problems, for example rocket and jet plane in avigation, steam pump, steamer, firebox in dynamical aspect, mixed equiment in chemical engineering, jet component in autocontrol, as well as jet incision, water power digging, public fire fighting, water irrigating in agriculture, ventilated air condition and so on. Many flows in hydraulic engineering are jet type, for instance the water work building underpour, linking up and energy dissipation of downstream flow.In circumstance engineering , near area proliferation analysis of letting dirty,letting hot and letting gas is an important theory of the directing appliance of jeting theoretics. Thus, it becomes more and more needed to do embed research on flow characteristic of multiple jets.On the base of free turbulent jets in infinite space, the paper does theoretical analysis and experiment study on incompressible single jets and multiple jets in finite space. The experiments consist of two parts:1 Single circular turbulent jetVelocity of flow in different conditions is measured via changing exit runoff, then its changing rule along axes is summed up, Velocity distributing on transect is also studied.2 Multiple circular turbulent jetsOn the base of Single circular turbulent jet, Multiple circular turbulent jets are studied, including: (l)In finity space, we research on five holes jets in equity space and "1" array situations separately, summarize basic rules of orifice and then have subareas; (2)The distributing of velocity of two holes and fourholes which are equal on bore canister is studied, using hengquan reservoir bore canister energy dissipation model.更多还原