Theoretical calculation and numerical simulation of critical air velocity in tunnel fires 隧道火灾临界风速的理论计算与数值模拟
Utilization of Air Through Tunnel in Ventilation and Air Conditioning System of Buildings 地道风在建筑通风空调中的利用研究
Fungal spore spreads with the air in opened tunnel which makes mycetes in aisle and room higher than in the control group. 通风式坑道因形成空气对流,真菌孢子依靠气流向周围播散,通道和房间均明显高于对照组。
Air Tunnel Test and Research on the Control Car in 200 km/ h Electrical Passenger Train Unit 200km/h电动旅客列车组控制车风洞试验研究
Structural strength simulation test of the boiler furnace, heat transfer and resistance simulation test in a hot air wind tunnel as Well as platform and land-based evaluation test were conducted for the newly-designed boiler. 对新设计的锅炉进行了炉胆结构强度摸拟试验,传热,阻力热风洞摸拟试验,平台试验和陆上鉴定试验。
In order to investigate the influence of blast driving of the people's air defence tunnel on a TV tower being under construction, we have measured vibration velocity of the TV tower, cornerstone and the tunnel. 为检查人防工程主干道爆破施工对其上部正在进行主体混凝土浇灌的电视塔工程的影响,我们对人防坑道爆破瞬间的电视塔结构、电视塔附近基岩以及人防坑道底板的振动速度进行了现场测量。
The generation of mycetes contamination in the air in tunnel and its hazard to health 坑道空气真菌污染的形成及对健康的影响
The major pollutant of the water in the reservoir is the mycete in the air of tunnel. 坑道空气中的大量真菌是储水的主要污染源;
For it is very significant to systematically study the regenerative energy absorption technology and apply the proved regenerative energy recycling equipment in subway projects so as to decrease the temperature in tunnel and station and increase the air quality in tunnel. 为了降低隧道洞体和车站内温度并提高洞内空气质量,应当进行再生能量吸收的相关技术系统研究并在地铁工程中使用成熟的再生能量回收装置。
This article is mainly concerned with the structure and design of All Air Convection Cooling Tunnel. 本文主要论述对流冷却,隧道的结构和设计。
Disinfection effect of chlorine dioxide on the air in tunnel 二氧化氯对坑道空气消毒的效果
In order to reduce the air resistance in operation, the equipment chamber is provided in the bolster, and its necessity is expounded with the use of air tunnel test results. 为减少运行中的空气阻力,在枕内设有设备仓,并以风洞试验结果阐述其必要性。
The Observation and Analysis of Influence of Blast Driving of the People's Air Defence Tunnel on a TV Tower under Construction 人防坑道爆破掘进对施工中的电视塔的影响观测与分析
Application of air purification techniques and development of a device for purifying air in tunnel 坑道空气净化技术应用及其装置研制
Transforming Local Civil Air Defence Tunnel into Main Fan Performance Test System 局部开发人防坑道为主扇性能测试系统
Methods: Mycetes in the air in tunnel were detected with the method of knock-on in three types of ventilation according to its colonial morphology and growth construction. 方法:用撞击法检测密闭、半密闭和通风式3种类型坑道内空气真菌数,根据真菌菌落形态特征及生长结构进行菌株鉴定。
Allocation of Air Compressor in Tunnel Construction 隧道施工中空气压缩机的配置
A New Method Measuring the Volume of Air Flow in Tunnel Driving's Fan 隧道掘进通风机风量检测新方法的研究
For the example of cross section which obtained by slitting the modal along axis of exhaust air tunnel, influence on stress and displacement of main tunnel and exhaust air tunnel was analysised at intersection zone on branch tunnels excavation period. 以应力和位移变化最为明显的排风通道轴线剖切模型所得到的断面为例,分析了随各支洞的施工,隧道主洞与排风通道交叉处围岩位移、应力的特征。
The concrete manifestation is: 1. Based on the theory of fluid mechanics and heat transfer, taking into account of heat convection between air and tunnel wall, three-dimensional unsteady viscous, compressible, non-isentropic flow field model is established. 具体表现在:1.以流体力学和传热学理论为基础,考虑空气与围岩对流换热,建立了三维粘性、可压缩、不等熵非定常流模型。
Analyzes the the changing of the pressure field, flow field and eddy current with the changes of train speed, while the horizontal condensing air tunnel under various conditions; and compares the changes in the same speed under various conditions, to grasp the variation. 分析了横向冷凝风道在各个工况下压力场、流场的随车速的变化情况,以及涡流的变化情况。并对比了各个工况同一速度下的变化情况,掌握其变化规律。
Since the system of air through tunnel is simple, to save energy and investment, just responding to the energy development strategy of China, the prospect of air through tunnel is vast. 由于地道风降温系统简单,节省能源和投资,响应了我国的能源发展战略,所以地道风的应用前景是很广泛的。
And the application of "key ring" in monitoring of air volume of tunnel are discussed. 探讨了关键环在巷道风量动态监测中的应用。
The supersonic air tunnel ground-testing system for ramjet needs high temperature and high pressure air supply to simulate the real air current. 在超声速风洞冲压发动机地面试验系统中,需要高温高压空气源产生模拟高速飞行的气流。
Aerodynamic characteristics analysis method with the theoretical calculation method of air, wind tunnel experiment and numerical simulation method. 气动特性分析的方法有理论计算法、风洞实验、数值模拟法。
This thesis is based upon theoretical analyses of heat and mass transfer between soil and air in the tunnel undergoing ventilation and cooling process. Experiments and tests were conducted concerning soil thermal conductivity as well as heat and mass transfer process. 本论文在对地道通风降温过程中的土壤与地道内空气传热传质过程进行理论分析的基础上,进行了土壤导热系数及传热传质的实验测试工作,并利用CFD技术对地道通风降温效果进行模拟。
For the example of exhaust air tunnel cross section, influence on stress and displacement of surrounding rock for exhaust air tunnel was analysised on branch tunnels excavation period, obtained influence scope for parallel tunnels construction. 以所选排风通道断面为例,分析了随各支洞的施工,排风通道围岩位移、应力的特征,获得了隧道并列施工的影响范围。
It further validates the results of numerical simulation, provides a theoretical basis for how to optimize the horizontal condensing air tunnel, to make up for the lack of research on the horizontal air inlet and exhaust. 进一步验证了数值模拟计算的结果,从而为如何优化横向冷凝进排风提供了理论依据,弥补了关于横向进排风研究不足。