hot air

hot air的基本解释

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吹牛, 空谈, 空话, 吹牛皮, 空想

与hot air相关的网络例句 [注：此内容来源于网络，仅供参考]

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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。

与hot air相关的网络解释 [注：此内容来源于网络，仅供参考]

hot air：热风

红外加热风(Hot air)回流焊:这类回流焊炉是在IR炉的基础上加上热风使炉内温度更均匀,单纯使用红外辐射加热时,人们发现在同样的加热环境内,不同材料及颜色吸收热量是不同的,即(1)式中Q值是不同的,因而引起的温升ΔT也不同,

hot air：热空气

碳权的供给主要来自俄罗斯与东欧的热空气(hot air),未来二气化碳的盘查与查证、产品效能、总量管制...等国际上的机制也在逐渐建立中. 新科技仍是我们最倚仗的. 碳的捕捉和储存(CCS- Carbon Capture and Storage) 的计划,

hot air：吹牛

可能微软真的没有吹牛(hot air)吧. 谷歌开发者大会(Google developer conference)充满了产品的发布消息,但是我们最为激动的一个产品发布消息是软件工程师Moishe Lettvin利用自己20%时间做的一个项目.

hot air：夸夸其谈

当我们把某个话称为"夸夸其谈"(hot air)时,我们的意思是说话者嘴里出来的就像风一样,是气,是空的没有内容. 他的话没有达到预期的目的,除了说出了话之外并没有提供任何新的信息. "碰巧的是"夸夸其谈(hot air)(呼出热气)"和"屁话(粪便)"有相似性,

hot air heating：热风采暖

horizontal water-film syclonet卧式旋风水膜除尘器 | hot air heating热风采暖 | hot air heating system热风采暖系统