查询词典 jets

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。

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。

Studied the flow problems of common airfoils under the effect of multi-slot jets with high angle of attack.

研究了普通翼型在多喷口吹气作用下的大攻角绕流问题。

We also show that not all WSC designs can form annular jets, only annularly initiated WSC, which also fulfils the "Internal-External Liners Equal-Impulse" criterion, has the capability to form annular jet.

本文也表明并不是所有的W型聚能装药都能够形成环形射流，只有在环形起爆方式下，根据内外罩等冲量方案设计的W型聚能装药才能形成环形射流。

Regarding the jets with female that contact the water directly, need to be covered with telfon tape in anticlockwise direction to avoid the interior water leak out.

带牙的且牙体能直接接触到水的配件都要用生胶带顺时针旋紧，以防止水透过牙缝漏出

The study of jets presents one of fascinating and intriguing aspects of astronomy and astrophysics.

喷流的研究是天文学和天体物理学中最使人感兴趣的课题之一。

Has the athleticism to hang with Denver's jets, as well.

他的运动天赋也足以跟得上掘金的速度。

Li jets Bee tiger with gorgeous tropical bird feathers characteristic : its throat is chestnut red, wings and back of the green. The tail is blue, the sun exposure, body glitter with their metal-like gorgeous sheen.

栗喉蜂虎具有热带鸟类羽毛艳丽的特征：它的喉部是栗红色的，翅膀和背部是绿色的，尾翼是蓝色的，在阳光的照射下，它们全身闪烁着金属般的艳丽光泽。

Fache checked his watch and gazed out at the scattering of jets parked in front of the terminal."If they're going to Biggin Hill, how long until they land?"

法希对了一下表，然后凝视着窗外零星停靠在航空集散站前面的飞机说："如果他们去比金山，要多久才能着陆？"

Mark Bisset is a recognised world expert on the business jets market and on issues relating to it such as the Cape Town Convention and on the EU emissions trading scheme.

Mark Bisset是商用喷射机市场领域全球公认的专家，擅长处理相关法律问题，包括《开普敦公约》以及《欧洲二氧化碳排放交易计划》。

Apllied the data of QuickBird-2——the highest resolution remote sensing,and based on the theory and methodology of fractal geometry,we have quantitatively studied remote sensing lineations in Gaolong gold deposit of Guangxi.

采用Quick Brid-2高分辨率卫星遥感数据，通过分形几何学的盒计维数法，定量研究广西高龙金矿区遥感线性构造。

So, sometimes, to change the color can not be your food (referring to the above-mentioned crustacean) has been a sign of boiling over.

所以，有时，来改变颜色，不能你的食物一直是沸腾了的迹象。