本文对浮力作用下的矩形射流扩散燃烧过程进行了三维大涡模拟。
The buoyancy effects on horizontal jet diffusion flames are investigated using large eddy simulation.
并在此基础上，利用射流扩散理论导出平衡冲刷坑堆丘位置的预报公式。
Based on the theory of jet diffusion the formula for predicting the position of dune in equilibrium scour pit are deduced theoretically.
对射流核长度、射流扩散角与出口弗劳德数、淹没水深之间的关系进行了探讨。
The relations among the length of the core region, the diffusion angle and the froude number and the submerged depth were also studied.
多孔射流扩散器排放城市污水是充分利用天然水体环境容量和自净能力的有效途径。
The use of submerged multiport diffusers presents an efficient method to rapidly dilute large volumes of wastewater discharged into ambient receiving water.
试验结果表明：污水射流扩散和近区内的稀释度主要决定于射流佛劳德数、相对水深和相对流速。
The results indicated that the diffusion and dilution of wastewater jet mainly depended on jet Froude Number, relative depth, and relative velocity.
用水力实验方法研究了明渠水流中园形污水射流近区扩散与混合的特性。
The characteristics of wastewater round jet into open channel flow and its mixing and diffusing in the near-field were investigated by means of a laboratory experiment.
划分燃料抛撒过程为三个阶段：射流形成与扩散运动阶段、燃料两向膨胀运动阶段和气液融合运动阶段。
Fuel dispersal are divided into three stages: that is, the forming and spreading of jet, the expanding of fuel in two directions and the merging motion of gas-liquid.
针对水平射流钻头钎焊工艺存在的问题，提出用真空扩散焊接代替钎焊制造水平射流钻头的新工艺。
In allusion to the problems of vacuum diffusion welded jet bits, a technique for manufacturing horizontally projected jet bits by means of vacuum diffusion welding was put forward.
当房间尺寸沿着射流方向加大，冷风射流卷吸、扩散能力下降，造成了室内温度场、速度场分布不均，人体舒适性下降。
If enlarge the room size in the direction of the jet flow direction, the ability of cold jet attaching, diffusing and rolling will drop, which leads the comfort level dropped.
本文结合模型试验，得出了不同温升及变率下表面横向浮射流的瞬时浓度场和流速场，进而分析得出随着温度及变率的变化浓度场的扩散范围、形态特点和趋势。
Based on the model test, the instantaneous concentration and velocity images in different temperatures and scales are put forwarded. And the range, shape and trend of diffusion are acquired.
型宽尾墩是集横向扩散与纵向拉伸于一体的堰顶射流消能技术。
The T-type flaring pier is an energy dissipation technology by injection flow on weir crest, which incorporates lateral diffusion and longitudinal tension.
应用紊流代数应力模型计算了简单边界条件下淹没碰壁射流的扩散规律及紊动特性，对计算结果与试验实测资料作了比较。
An ASM turbulence model was used to calculate the expansion and turbulence characteristics of the submerged impinging jets, and the calculated results was compared with experimental data.
在燃烧器区域处使网格线与煤粉射流方向基本一致，以有效地减小数值模拟中的伪扩散问题。
The direction of grid lines in the burner block is consistent with the direction of pulverized coal jet, which can reduce false diffusion in the simulation.
分析水平面与竖直面氧化空气体积分数分布，考察射流对氧化空气的扩散作用。
Analysis of the air volume fraction distribution of oxidation air of horizontal and vertical plane is used to investigate the effect of the rotary jet mixing device diffusing the oxidation air.
分析水平面与竖直面氧化空气体积分数分布，考察射流对氧化空气的扩散作用。
Analysis of the air volume fraction distribution of oxidation air of horizontal and vertical plane is used to investigate the effect of the rotary jet mixing device diffusing the oxidation air.
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