| 1. | Experimental research on low specific speed roto - jet pump
低比转数旋喷泵的试验研究 |
| 2. | The increasing - flow design method is presented on superlow - specific - speed high - speed centrifugal pump in this paper
阐述了超低比转数高速复合叶轮离心泵的加大流量设计方法，并给出了两个设计实例。 |
| 3. | Super - low specific - speed centrifugal pump is a part of centrifugal pumps , which is widely used in aerospace and petrochemical industries
极低比转数离心泵（ ns < 30 ）是离心泵的一部分，其在宇航事业和石化工业等领域应用广泛。 |
| 4. | According to the distribution of pressure and velocity on the 5 types of impeller , it analyses and discribes the feature of internal flow in super - low specific - speed pump impeller
通过对五种叶轮内流动的模拟比较，描述了极低比转数叶轮内流动的特点。 |
| 5. | A new type of very low specific speed pump ? roto - jet pump is presented for low flowrate and high head transportation , which is introduced at the end of the thesis
论文最后主要研究了一种隶属于极低比转数离心泵范畴的新型泵? ?旋喷泵，它是一种新型的石油化工用泵，具有流量小、扬程高、流量扬程曲线平缓的特点。 |
| 6. | This thesis also describes the numerical simulation of three - dimensional turbulent flow in super - low specific - speed impeller , points out the turbulence model and numerical solution for it , and gives the writer ' s view of the grid - generation
论文的另一部分工作是数值模拟极低比转数泵叶轮内部流动，提出了适合的湍流模型和数值解法，并对网格的划分提出了自己的看法。 |
| 7. | The roto - jet pump is a new kind of very low specific speed pump which is developed in recent years . it is always used in carbin black , food production , chemical industry and deep well mining system to supply the steady outflow with low flux and high pressure
旋转喷射泵是近些年才发展起来的一种极低比转数泵，主要用在碳黑、食品、化工以及深井采矿系统中用以提供小流量高水头的稳定出流。 |
| 8. | In present thesis , the actual design theories and methods for super - low specific - speed pump are introduced first , including " the increased flowrate design method " , " the method of anti - hump on h ~ q characteristic curve " , " non - overload design method " , " the design method of complex impeller " and so on . according to these methods , 5 types of impeller have been designed
论文首先对极低比转数离心泵的现行设计理论和设计方法作了介绍，包括加大流量设计法、减小或消除扬程曲线驼峰的途径、无过载设计及复合叶轮设计法等，并按照这些方法设计了五种叶轮。 |
| 9. | Comparing tow methods of efficency pre - estimation , it finds out the new method fit for super - low specific - speed pump . acoording to the study and comparison on efficency and reliability , the thesis points out merits and faults of the 5 types of impeller , and draws a conclusion that the complex impeller and partly blocked - flow - passage impeller are fit for the impellers of super - low specific - speed centrifugal pump
比较了泵效率预估的方法，提出了适合于极低比转数泵效率预估的新方法，并对其性能要求的效率和可靠性两方面进行了研究比较，指出了五种形式叶轮各自的优缺点，得到结论：复合叶轮和部分堵塞流道的一般叶轮适合作极低比转数泵叶轮。 |
