| 1. | Cold gas blanket experiment
冷气体包层实验 |
| 2. | In cold gas fraction is one of the most important parameters at influencing the performance of vortex tube
对涡流管性能受冷气流分量的影响进行了实验研究。冷气流分量是影响涡流管性能的因素之一。 |
| 3. | Adjusting the cold gas fraction can control the performance target of vortex tube with fixed other parameters , which offers some referring data for practice applications of vortex tube
在其它参数一定的情况下，可以通过调节冷气流分量来改变涡流管的性能指标。为涡流管的实际应用提供了一定的参考数据。 |
| 4. | Vortex tube utilizes certain pressure gas as working medium producing the effect of separating , which makes the gas separating into cold and hot parts . the cold gas among them can be used refrigeration
涡流管制冷是利用一定压力气体作为工质经过涡流管产生分离效应，使气流分离成冷热两个部分，其中的冷气流可用来制冷。 |
| 5. | Decades of observations have established that stars form within so - called molecular clouds : vast agglomerations of cold gas and dust , each with enough material to form scores of suns
在累积了数十年的观测结果之后，一般相信恒星是在所谓的分子云中形成：在辽阔的冷气体与尘埃凝聚区域，每朵分子云都拥有足以形成许多太阳核心的材料。 |
| 6. | This paper described a cold gas simulation of solid rocket motor with submerged nozzle . a two - dimension model with rectangular channel was designed , which can simulate different flow conditions at three periods after ignition
本文从冷流模拟的角度出发，设计了通道为矩形的含潜入喷管发动机冷流模型，可以模拟发动机工作过程中三个不同时刻的流动状态。 |
| 7. | On the basis of cold gas simulation , a numerical simulation of two - phase turbulent flow was performed employing an eulerian - eulerian approach and k - - a . p . turbulent model . the accuracy of numerical simulation was verified and evaluated by the experimental result
在冷流模拟的基础上，对燃烧室尾部的两相湍流流场进行了数值模拟，数值模拟采用双流体模型和k - - a . p .湍流模型。 |
| 8. | The effects of reynolds number , back surface of nozzle , aft - dome configuration and degree of submergence on aft - end internal flow were studied by both cold gas simulation and numerical simulation . it is showed that the separated flow is sensitive to the change of reynolds number and aft - end cavity configuration
最后，利用冷流模拟与数值模拟相结合的方法，研究了雷诺数、喷管背壁形状、后封头形状和潜入深度对燃烧室尾部流场的影响，结果表明流动的分离对雷诺数和背壁区几何边界的变化很敏感。 |
| 9. | 2 . using cfd software - fluent , many flow states were been simulated . these states are the influence of nozzle structure with the flow , the distributing characteristic of inside flow , the influence of cold gas flow and outside flow with the work of the nozzle , the change of inside pressure load when the nozzle regulates
2 、借助cfd软件fluent ，计算出可调喷管本身结构对流动的影响、可调喷管流场的参数分布、冷却气流对喷管流动的影响、外流对可调喷管内流的影响、喷管的冷流流场和喷管调节过程中内壁面的压强载荷变化。 |
| 10. | It is showed that numerical calculation could give the same position of separation line with the cold gas simulation . however , numerical simulation result is of a little deferent from cold gas simulation in some details , such as recirculation velocity and turbulent intensity . the main problem of numerical simulation is that the turbulent model is not perfect , and the computational grid is not precise enough
利用实验结果对数值模拟的准确性作了检验和评价，结果表明数值模拟能给出与实验结果一致的分离线位置，但在某些流动细节上还有差别，如回流速度大小和湍流度等，数值模拟中存在的主要问题是湍流模型不够完善和网格生成不够精细。 |
