查询词典 air space

The main work and the originality points of this dissertation could be concluded as the following parts:(1) To analyze systematically the mathematical model of LES of air flow in great space, under the case of isothermal and non-isothermal, as well as the combined action of buoyancy and strain. Some basic problems are studied about the LES application into airflow simulation of great space, such as boundary conditions, spatial difference scheme and time advancing scheme, time step etc., which creates the basis for the LES application to indoor airflow simulation.(2) Both the instantaneous and time averaged flow field of great space with multiple jets under isothermal and non-isothermal cases are explored with large eddy simulation method, and also discussed the dynamic characteristics and the law of fluidflow in the great space.(3) Based on the results of LES of the great space and the Fanger thermal comfort indexes, it is brought forward the concept of the series of dynamic thermal comfort evaluating indexes, which could be divided into thermal comfort index with time averaged properties PD, PPD, PMV, thermal comfort index with instantaneous properties IPD, IPPD, IPMV, and time averaged thermal comfort indexes TAPD, TAPPD, TAPMV, and transient situations time averaged thermal comfort indexes TTAPD, TTAPPD, TTAPMV. The differences among them and the calculation methods are discussed, and the four kinds of indexes are calculated with the thermal comfort index PD as an example.(4) Based on the LES results it is discussed the hot air stratification phenomena in air-conditioned buildings in the case with air supply and return registers on the ceiling and the case on the sidewall. The fundamentals of the hot air stratification are studied and the relations of estimating hot air stratification are brought forward.(5) With the advanced apparatus such as hot wire film anemometer IFA300 and laser particle field anemoscope, corresponding model test and site measurements have been done, which are compared with the simulation results and LES is proved a very promising method in air flow simulation indoor.

本文主要工作既创新点体现在以下几个方面：(1)系统分析了等温、非等温和考虑剪切力与浮升力综合作用的高大空间大涡模拟数学模型，并研究了高大空间大涡模拟在室内气流仿真应用中的一些基本问题，如边界条件、空间离散格式和时间推进格式、时间步长选择等问题，为大涡模拟在室内气流计算中的广泛应用打下了基础；(2)首次用大涡模拟方法研究了高雷诺数下高大空间多射流在等温、非等温情况下的瞬时流场和时均流场分布，并探讨了多射流流场的动态特性和流动规律；(3)基于大涡模拟的动态仿真结果和Fanger的热舒适指标，首次系统地提出了动态热舒适评价指标体系的概念：即基于时间平均参数的热舒适指标PD、PPD、PMV；基于瞬时参数的瞬时热指标IPD、IPPD、IPMV；基于时间平均热舒适指标TAPD、TAPPD、TAPMV；以及沿行动迹线的时间平均热舒适指标TTAPD、TTAPPD、TTAPMV，并分析了四类热舒适指标的差异性和计算方法，还以PD值为例对四类指标分别进行了计算；(4)基于数十种工况下空调房间大涡模拟的结果，研究了空调建筑上送上回和侧送侧回两种情况下热分层现象，并探讨了热分层的基本规律，首次提出了避免热分层现象的判断公式；(5)在暖通空调领域，首次使用IFA300热线风速仪、激光粒子速度场仪等先进设备，完成了与大涡模拟相对应的模型试验，并把实测结果与仿真结果进行了对比，说明LES在室内气流仿真方面是一种很有前景的方法。

Performance evaluation method system of hierarchical IFFCS in air-to-air gunnery mission: The IFFC essence in air-to-air gunnery mission is a problem of space pointing track. Its hierarchical structure consists of three level loops: flight control system loop, space pointing track loop and tactical mission loop.

多重递阶的综合飞行/火力控制系统空/空机炮模态性能评价方法体系；综合飞行/火力控制系统空/空机炮模态本质上是一个空间指向跟踪问题，其多重递阶结构从内到外包括三个层次的回路：飞行控制系统回路、空间指向跟踪回路和战术任务回路。

The main reason is that many high-grade office space is equipped with all-air central air conditioning, is to first deal with air, reducing temperature and humidity, the air sent through the pipeline to the room through the return air, pipeline to return to the central processing system, central processing system for cooling air return after降湿part of the new wind coupled with the second round after the blast, and so the cycle, while the central air-conditioning system for energy conservation, often adding a little fresh air, return air devices in the recovery rate of 80%, resulting in cross-infection the opportunity to increase significantly.

主要的原因是，许多高品位的办公空间配备了全空气中央空调，是先处理空气，降低温度和湿度，空气通过管道传送到房间通过回风管道返回中央处理系统，中央处理系统，冷却空气降湿后返回的一部分，新风，加上第二轮爆炸后，所以周期，而中央空调系统节能，往往增加了小新鲜空气，回风装置，回收率为80 ％，导致交叉感染的机会大大增加。

According to the different functions of rooms, the focus on air-conditioning system is divided into two kinds of air supply, large space such as foyer, and other all-air system, directly from the new wind and the introduction of outdoor air return of air supply; office and equipment Such as the use of fan-coil plus an independent air system, the new wind from the outdoor unit to introduce new wind to deal with indoor air enthalpy value, fan coil bear all indoor cooling load and part of the new rheumatoid load.

根据各不同功能房间，将该集中系统分为二种空调送风方式，高大空间如门厅等采用全空气系统，新风直接从室外引进与回风合后送风；办公室及设备间等采用了风机盘管加独立新风系统，新风机组从室外引入新风处理到室内空气焓值，风机盘管承担室内全部冷负荷及部分的新风湿负荷。

Bubble Act in accordance with the parameters determined the number of bubbles in the hardening concrete, the size and spacing, concrete calculation of gas, air space, and other factors to evaluate the parameters of the concrete structure of antifreeze.

气泡参数法根据测定硬化混凝土中气泡数量、大小和间距，计算混凝土含气量检测仪器、气泡间距系数等参数来评价混凝土结构的抗冻性。

Bubble Act in accordance with the parameters determined the number of bubbles in the hardening concrete, the size and spacing, concrete calculation of gas, air space, and other factors to evaluate the parameters of the concrete structure of antifreeze.

气泡参数法根据测定硬化混凝土中气泡数量、大小和间距，计算混凝土含气量、气泡间距系数等参数来评价混凝土结构的抗冻性。

In Nork city alone,six major institutions have spred up and out into the air space and neighborhoods around it or are pareparing to do so.

在 Nork 城市，独自地，六个主要的机构已经传布在和上面在外进入在它周围的空中和邻近地区之内或者正在准备这么做。

Impeller rotates clockwise, the right part of the space between two blades is gradually increasing, in confined conditions, with the air volume increases, pressure decreases, the formation of vacuum pumps and air through the pipeline suction tube into the vacuum pump the right side of the crescent-shaped shell inspiratory mouth to be sucked into vacuum pump, vacuum pump impeller left some space between the two blades is gradually reduced, so the air is compressed, the pressure then increased, and finally through the vacuum pump shell crescent-shaped exhaust port from the left side of vacuum pumps, gas separator into the water box, so that was taken out after the separation of the recycled water reuse.

叶轮顺时针方向旋转时，其右半部分两叶片之间的空间逐渐增大，在密闭条件下，随着空气体积的增大，压力随之降低，形成真空，水泵和管路内的空气通过吸气管，进入真空泵泵壳右侧的月牙形吸气口被吸入真空泵，真空泵叶轮左半部分两叶片之间的空间是逐渐减小的，因此空气被压缩，压力随之增高，最后通过真空泵泵壳左侧月牙形排气口排出真空泵，进入水气分离箱，使被带出的循环水分离后再重复使用。

Selection of insulator type,number of insulator string and air space is the main basis of transmission line insulation coordination .

输电线路的绝缘配合主要是选择绝缘子型式、绝缘子串的片数和空气间隙。

It may or may not be true that the Navy spy plane which collidedwith the Chinese fighter jet was in Chinese air space.

或许海军间谍飞机与中国战斗机相撞是在中国领空，或许不是，这几乎没什么关系。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！