对流

Simulations of rarefied gas flow over a cylinder were performed with and without this modified ALTS method, and the result shows that these modifications result in a significant reduction in the execution CPU time, but introduce little difference on the simulation resolution and the flow structure.

结果表明，改进后的自适应当地时间步长法能明显缩短流场达到稳定所需的计算时间，对流场模拟结果产生的影响却非常小。

Based on experimental measurements, the mechanism of heat-transfer characteristics as well as the mechanism of flowing friction in narrow annuli is primarily analyzed.

在实验的基础上，本文对窄环隙内的强迫对流换热特性和流动阻力特性进行了初步的分析。

In the last two area, heat transfer in narrow annuli is better than that in normal circular tubes.

在层流充分发展区和紊流区，窄环隙的对流换热特性要好于普通圆管。

In experimental respect, the experimental investigations of natural convection heat transfer of air layers in vertical annuli are presented.

本文首次从实验和理论两方面对大高宽比竖环形封闭空腔内自然对流换热进行了比较全面和系统的研究。

Numerical and experimental study were carried out to investigate the natural convection heat transfer in concentric circular annuli under horizontal and inclined conditions.

本文对倾斜与水平同心套管夹层内介质的自然对流换热问题进行了数值模拟和实验研究。

Three-dimensional transient and steady-state natural convection in cylindrical annuli filled with porous media has been studied by numerical calculation in detail.

本文采用数值计算系统地研究了多孔柱环内三维稳态和暂态自然对流流动和传热。

An experimental study of natural convection heat transfer in concentric and eccentric horizontal cylindrical annuli［J］.

陈光明。变物性对水平同心套管中自然对流换热的影响［D］。

In this paper, using single-phase water as working fluid, the experimental research was performed to investigate the frictional pressure drop and heat-transfer characteristics of forced convection in narrow annuli under atmospheric pressure.

本文以单相水为工质，在常压下对窄环隙流道进行了强迫对流换热特性和阻力特性的实验研究。

When the Ra〓 is from 10〓～10〓 under horizontal annuli, the flow is in transition or in turbulent condition.

在水平同心套管〓，处于过渡和紊流状态的自然对流换热进行了数值模拟。

Experimental investigation on strongly separated flow in an annular compressor cascade ;2. The structures of separated flow, especially, vortices, inside an annular compressor cascade at large incidences have been studied baized on the flow visualization images obtained by means of Laser-sheet method and 7-hole probe measurement.

本文采用激光片光层加示踪粒子流场显示技术，观察和摄取了环形压气机叶栅在约十14大攻角下的内部流动图像；采用七孔气动探针测量了叶栅出口截面上的速度分布S通过对流场实验结果的分析，并结合本文第一部分中得到的叶片近壁区分离流结构，得到了该环形压气机叶棚中严重分离流场的分离流形态和旋涡结构。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。