热线

In this paper, the technique of constant temperature anemometer is usedto study the turbulent boundary layer which is controlled by periodicblow-suction on the wall.

本文应用热线测速技术，对风洞中平板湍流边界层壁面施加周期性抽吸扰动进行实验研究。

The characteristics of asymmetric impinging streams were measured with hot wire anemometry and simulated with CFD.

华东理工大学资源与环境工程学院，上海 200237摘要采用恒温式热线风速仪测量不对称撞击流流场。

In this paper, coat is applied to the project of gas pipe flow from west to east. Thetechnique of constant temperature anemometry is used to study the mechanism ofdrag reduction for turbulent boundary layer coated on the surface of wall.

本文为了配合西气东输工程中采用管道壁面涂料减阻技术，应用热线测速技术，对风洞中壁面覆盖减阻涂料的平板湍流边界层进行减阻机理的实验研究。

Using the hotwire anemometry,the experimental study is carried out on a novel multi-diaphragm piezoelectric synthetic jet actuator.

利用热线风速仪，在最佳激振频率f=560 Hz时，研究了不同孔径、不同孔深、不同小孔出口几何形状等对多压电膜式零质量射流激励器性能的影响。

The hot-wire anemometry was also used to characterize the air flow patterns that were generated by high and low swirl port in a cylinder of a steady-flow rig. Some important phenomena of air flow in the simulative cylinder were found.

借助于热线风速仪研究了两种不同的螺旋进气道在稳流气道试验台的模拟气缸中产生的流场结构，发现了一些重要的现象。

The instability characteristics of swirling flow in the cyclone were studied based on measured real tangential velocity by hot wire anemometry.

采用二维热线风速仪测量了Φ300mm旋风分离器内瞬时切向速度随随时间的变化，主要考察旋转流的不稳定性。

ABSTRACT In this paper, an investigation on the helical ports was carried out in a steady-flow rig. The three velocity Components of air flow through the intake valve of several typical helical ports were measured by hot-wire anemometry for analysing the relationships between intake port geometry and swirl level as well as flow resistance.

本文在稳流气道试验台上对螺旋进气道进行了大量的研究，为了分析螺旋进气道的结构形状与涡流强度及流动阻力的关系，采用热线风速仪测量并分析了不同气道的气门口气体流速。

The axial velocity and stagnation point offset of two opposed jets coming from two asymmetric nozzles oppositely located with large separation distance were studied by using hot-wire anemometry.

采用热线风速仪对大喷嘴间距下两不对称喷嘴形成的对置撞击流的轴线速度分布和驻点偏移规律进行了实验研究。

Thermal power engineering ; Boiler ; Burner ; Heat thread anemoscope ; Simulation

热能动力工程；锅炉；燃烧器；热线风速仪；仿真

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。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。