In order to solve this problem, the effects of airflow velocity and airflow direction on heat transfer coefficient of wall surface are studied in this paper.
为了解决这个难题，本文通过实验测试和系统辩识的方法研究了风速风向对墙体表面换热系数的影响。
This paper indicates that tunnel airflow velocity defined in the existing code for the design of metro doesn't satisfy the requirement of tunnel ventilation in case of fires.
分析现行规范规定的数据，用临界风速公式进行计算得出区间隧道风速不满足通风要求。
The experimental results show that acoustic resistance of perforated plate is related to plate thickness, aperture diameter, numbers of aperture, acoustic frequency and airflow velocity.
研究表明：穿孔板的声阻与孔板厚度、孔径、穿孔数目、声波频率和气流速度等因素有关。
We simulate engine performance in various operating conditions:in idle condition, it reduces the residual gas coefficient and increases airflow velocity, so that idle stability is improved.
模拟计算了各种工况下的发动机性能：怠速工况降低了残余废气系数，提高了进气流速，稳定性得到改善；
The results show that the heat transfer coefficient of wall surface is proportional to air velocity under normal airflow velocity, but it is not affected significantly by airflow direction.
研究表明：在通常室内风速条件下，墙体表面换热系数与风速速率的大小成正比，而风向对墙体表面换热系数的影响不明显。
The dimensions of these bubbles can be controlled simply by changing the velocity of the airflow across the surface.
这些气泡的结构可以通过改变空气在表面的流速来控制。
With numerical simulation method the effect of the airflow pattern created by the air inlet of varying velocity on contaminant concentration and thermal comfort in an operating room was investigated.
就变化风速的送风口所产生的气流流型对外科手术室内的细菌浓度和人体热舒适的影响进行了数值模拟分析。
A thorough research on the crucial velocity of sucking airflow affected by annular jet is conducted.
对环形射流作用下吸气流动的临界射流速度进行了全面研究。
Hot air curtain is strong airflow generated by the rotation of the fan rotor, curtain like flow out a certain velocity and temperature, forming a invisible curtain.
热风幕是通过风轮的转动产生的强大气流，送出一定速度和温度的幕状气流，形成一面无形的门帘。
It is found that the velocity field distribution of airflow internal the muffler is similar to that of pressure and temperature field.
发现了消声器的内部气流的速度场、压力场以及温度场具有相似的分布特点。
Both the ratio of friction velocity to free stream wind velocity and the thickness of airflow are subject to the sidewall effect, showing the increase trend with the decreasing aspect ratios.
随着风洞宽高比的减小，断面内中垂线上的气流摩阻速度与自由流速的比值以及受风洞边壁影响的气流厚度均增大。
The response of porous fence to the near-surface airflow can be characterized quantitatively by sand particles threshold wind velocity.
气流对栅栏的响应可以定量地用沙粒的起动风速来表征。
Measures critical jet velocity, velocity field distribution and effective limits of this suction-airflow under different conditions.
测量了该吸气流动在不同工况下的临界射流速度、速度场分布、有效作用范围。
It has been shown that the velocity of sand flow and airflow at the entry of core-box was quite different.
结果表明，射砂孔位置的气流和砂流速度有显著差别。
The results show that, with the changes of the relative velocity of the airflow, the instability of the system will occur suddenly;
结果表明：随着相对进气速度的改变，系统将会发生突然失稳；
The following topics were studied in this paper:(1) Analysis of the airflow in the air-conditioning room, and to find out the equations of the parameters such as temperature, velocity and pressure.
分析暖通空调室内气流的流动情况，建立起模拟区域内各种基本参数（温度、速度等）所满足的方程。
The following topics were studied in this paper:(1) Analysis of the airflow in the air-conditioning room, and to find out the equations of the parameters such as temperature, velocity and pressure.
分析暖通空调室内气流的流动情况，建立起模拟区域内各种基本参数（温度、速度等）所满足的方程。
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