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 ( HWA). 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。
An engineering method for calculating transient surface heat flux and surface temperature of hypersonic vehicle is described in this paper, including stagnation point and out of stagnation point. 采用工程算法,包括驻点和非驻点的瞬态表面热流和温度的计算以及完全气体和平衡气体条件下边界层外缘参数的计算。
Stagnation Point Offset of Two Asymmetric Nozzle Opposed Jets with Large Nozzle Separation Distance 大间距两不对称喷嘴对置撞击流驻点偏移规律
Numerical simulation shows that: ( 1) the location of the maximum Nusselt number was offset from the stagnation point at a certain distance; 计算结果显示:冲击区努赛尔特数最大值不在驻点,而是偏离驻点一段距离;
The mass transfer rate at the forward stagnation point of the droplet is derived to show the effect of electrostatic forces on the collection of submicron particles. 根据雾滴前向驻点处有限直径粒子的沉积行为分析了雾滴与粒子间的静电作用对小粒子捕集效果的影响。
Algorithm for the All-Time Apparent Resistivity of LOTEM Method Stagnation Point Offset of Two Asymmetric Nozzle Opposed Jets with Large Nozzle Separation Distance 均匀半空间长偏移距TEM法全区视电阻率的数值计算方法大间距两不对称喷嘴对置撞击流驻点偏移规律
Flow criterion was introduced for stagnation point region and the body of the vehicle. 对驻点区和飞行器表面不同的流动区域给出了流态划分准则。
The maximum exterior pressure, the maximum heat flow and total heating at stagnation point; 驻点最大外压、最大热流与总加热量;
Calculation of the Distribution Rule of Strain Rate near the Stagnation Point during Explosive Welding 爆炸焊接驻点近区应变率分布规律计算
Based on physical model, the article studies reactions of river mouth deposition extending, and different sizes or positions of the mouth bar on the upstream river channel, and discusses the relationship between stagnation point and mouth bar. 通过模型试验,研究河口淤积延伸、不同尺寸和位置拦门沙对尾闾河道的反馈影响,并探讨河口径流与潮流交汇点(滞流点)与拦门沙的关系。
The results show that for the symmetric impact, the stagnation point pressure of incompressible fluid is smaller than that of the compressible. 发现在对称碰撞时,按不可压缩流体计算的驻点压力比按可压缩流体计算的驻点压力为小。
Analysis of Strain Field Near Stagnation Point in Explosive Welding 爆炸焊驻点近区应变场分析
The scales, formation mechanism and evolution feature of the upstream wall vortex in relation to stagnation point and the Scarf vortex in near field were analyzed. 分析了冲击区滞止点上游壁面涡结构和近区Scarf涡结构的尺度、形成机理和演化特征。
The distances away from the stagnation point of the secondary eddies rolling and separating from the impingement plate increase with increasing impact height. 随着冲击高度的增加,二次生成涡卷起及与壁面分离位置距离滞止点的位移也相应的增加。
A computational analysis of ignition of a flammable premixed gas which contains methane, steam and air at the stagnation point of a hot rod coated with a catalyst was conducted, and a comparison between the calculated and experimental results was made. 对CH4、水蒸汽和空气的预混气在涂有催化剂的热棒表面的着火进行了计算分析,并与实验结果作对比。
The ablative performance of C/ C composites with different carbon matrix was investigated by stagnation point ablation test. 本文利用电弧驻点烧蚀实验考察了三种具有不同碳基体的毡基C/C复合材料的抗烧蚀性能。
The problem of compressible boundary layer at the stagnation point of a three-dimen-sional body is investigated computationally in this paper. 本文对三维物体的驻点可压缩边界层问题进行计算研究。
Re-entry corridor and traject-ories are of great importance in order to determine free stream conditions as well as conditions in the stagnation point region of a descent vehicle. 为了确定返回舱的自由流条件和驻点区条件,其再入轨迹和再入走廊是十分重要的。
This paper, based on observed field data of hydrology and sediment, anlyses the reason of the formation of sand bar and, presents the process of sedimentation near the stagnation point. 本文根据黄河口实测水文泥沙资料,分析拦门沙形成的原因,阐明了泥沙在滞流点附近的淤积过程。
In the second thin boundary layer area, compute the middle and the fore part of the ship boundary layer as boundary layer method, from the stagnation point using the integral method to laminar flow and then the transition; 在薄边界层区域,使用边界层方法计算船体前部及中部的边界层。该方法基于积分法,使用势流压力分布作为输入参数,计算从驻点开始,此时先计算层流再计算过渡;
The next order conditions across a three-dimensional curved shock near stagnation point have been established, including the effects of heat conduction, viscosity and the shock structure. 本文建立了三维轴对称小曲率曲面击波驻点邻域的次级条件,其中包括热传导、粘性、击波结构的影响。
The shifting and breaking of the vortex pairs affects the distribution of the temperature so that the lowest temperature appears at the place where vortex pairs break and turbulent density is the biggest but not at the region corresponding to the stagnation point. 涡对的平移和破碎影响了温度场的分布,从而冲击靶面温度最低点不是出现在射流驻点区,而是对应于涡对破碎、紊流度最大的位置。
The locations of the maximum pressure zone and the maximum turbulent Kinetic energy zone all move towards the left with the movement of the stagnation point. 当倾角减小时,左侧回流区变小,而右侧回流区变大,最大压力区和最大湍动能区都随着滞止点的左移向流场的左侧移动。
The erosive burning and stagnation point drift in burning process of a solid rocket motor that has tubular charge with forge length-diameter ratio arc studied. 研究了长细比大的管形装药固体火箭发动机在燃烧过程中的侵蚀燃烧和滞点漂移现象。
A method for verifying mechanisms of increased stagnation point heat transfer rate in dusty flow 验证灰尘气体中驻点热流率增大机理的方法
The characteristics of lateral concentration distribution in a pollutant-contained impinging jet in the downstream region related to the stagnation point in flowing water are numerically investigated in detail using the RNG turbulence model, and compared with the corresponding experimental results. 采用RNG湍流模型对动水中含污染物冲击射流滞止点下游区域的横向浓度分布特征进行了详细的数值研究,并与相应的实验结果进行了比较。
So during missile head re-entry process, the optimization and research of the heat flux density on the stagnation point seems to be particularly important. 因此对于弹头再入过程中驻点热流密度的优化研究显得尤其重要。
Also the numerical simulations is used to simulate the distribution of convective heat transfer coefficient at the stagnation point and local area effected by exit velocity, nozzle-to-surface spacing and other parameters. 文中用数值计算的方法对驻点区及附壁射流区的对流换热系数的分布展开研究,系统分析了射流出口速度、喷嘴至加热面的间距等参数对对流换热系数的影响。
The basic formulas are Fay-Riddell balance boundary layer stagnation point heat flux formula and Lees 'formula. 基本公式为费-里德尔(Fay-Riddell)平衡边界层驻点热流密度公式,李斯(Lees)层流热流分布公式。
By varying the ratio of velocity, the flow behavior of laminar flow and the position of stagnation point can be adjusted. 通过设定不同的流速比,可以改变十字通道处层流的流动状态和驻点的位置。