查询词典 jet flow

The results show that, when the fuel supply position is located at the forebody of cavity, the jet flow of fuel supply has certain damage to vortex, and when the fuel supply injection is located at the afterbody of cavity, the jet flow of fuel supply has no damage to vortex.

实验表明，供油位置在凹腔前体，油气掺混孔处的射流对涡有破坏，供油位置在凹腔后体，油气掺混孔处射流对涡没有破坏作用，在不考虑供油方式等因素的情况下，凹腔后体供油优于凹腔前体供油。

These measures are as follows: shorten the primary wind intervals to improve thermal load of the burner; reduce the size of hypothetical circle of contact to prevent the flame from splashing; use nozzles with larger height/width ratio to increase the effusive rigidity, so as to increase the jet flow depth of secondary wind into the main jet flow; use a higher primary wind velocity to increase its jet flow rigidity; use a special flame holder structure of the primary nozzle, so as to improve

实践证明，采用这些方式最终有效解决了炉膛结渣问题，并切同时兼顾了锅炉热效率与炉内燃烧的稳定性。

In the area of calculation method of complex flow field in turbomachinery, this dissertation studies grid generation method for coolant jet flow field and domain decomposition approach for complex flow field.

在叶轮机械复杂流场的求解方面，本文对冷气喷射流场的网格构造及复杂流场分区算法进行了研究。

In this work, Large Eddy Simulation and standard k-εturbulence model were employed separately to simulate a round and a elliptic turbulent jet in cross flow with the Reynold number of 16600. The numerical results of the trajectory show a good agreement with the previous experimental data.

在空气分级和煤粉再燃技术中，OFA射流和再燃射流的穿透深度，以及与主烟气之间的混合扩散情况是脱硝率的重要影响因素，对这两股射流的流动规律进行研究是很有必要的，OFA射流和再燃射流都属于典型的横流中的射流(JICF：jet in cross flow)。

By simulating calculation with a new velocity distribution formula of free jet flow and a scour rate one, the resuspension of contaminated bottom sediment on the disturbing of boat propeller jet flow was studied.

河流、湖泊中船舶的航行对于水体底部的污染沉积物具有很强的扰动作用，特别是船舶尾部的螺旋桨射流。

Numerical simulations showed the axial velocity in the precessing flow were decreased significantly because of the entrainment of ambient air. The swirling motion, the wall attachment effect and the reverse flow were also found in the numerical flow field. It is shown that the simulation results of the precessing jet flow accord well with the analysis and the previous work.

数值模拟表明旋进射流的轴向流动速度衰减得很快，流场中存在明显的旋流、附壁效应和反向回流现象，所得到的结果与已有的分析结论基本吻合。

In comparison with bugle shaped nozzle, bifurcated nozzle downward jet angle 45°, cow-nose nozzle and three-hole nozzle, in all, the last two are better than the former and bifurcated nozzle downward jet angle 45 is better than bugle shaped nozzle; Cow-nose nozzle is helpful for guaranteeing the product's quality, in order to protect jet flow from eroding the strand at narrow face, gain uniform temperature distribution at cross section and decrease heat flux, adding the block's width to 100 mm. Three-hole nozzle is advantageous to increase flux and casting speed, but should avoid weak shell thickness in the center broad. In the real production, setting the SEN's immersed depth or plugging the hole at the bottom can adjust the flow and temperature distribution in the mold.

对比喇叭形水口，双侧孔水口(45°)，牛鼻子水口和三孔水口，总的说来后两者优于前两者；而双侧孔水口(45°)又优于喇叭形水口；牛鼻子水口和三孔水口比较各有特点，前者对保证铸坯质量有利，为防止流股对窄面的冲击，增加挡块宽度到100 mm，可使结晶器横截面上温度分布更加均匀，降低窄面热负荷；后者对增加流量，提高拉速非常有利，但要防止中孔射流过强导致铸坯中心坯壳变薄，在实际生产中可通过控制水口浸入深度或塞住浸入式水口的底孔来调节结晶器中的流动与温度分布状态。

In comparison with bugle shaped nozzle, bifurcated nozzle downward jet angle 45°, cow-nose nozzle and three-hole nozzle, in all, the last two are better than the former and bifurcated nozzle downward jet angle 45 is better than bugle shaped nozzle; Cow-nose nozzle is helpful for guaranteeing the product"s quality, in order to protect jet flow from eroding the strand at narrow face, gain uniform temperature distribution at cross section and decrease heat flux, adding the block"s width to 100 mm. Three-hole nozzle is advantageous to increase flux and casting speed, but should avoid weak shell thickness in the center broad. In the real production, setting the SENs immersed depth or plugging the hole at the bottom can adjust the flow and temperature distribution in the mold.

对比喇叭形水口，双侧孔水口(45°)，牛鼻子水口和三孔水口，总的说来后两者优于前两者；而双侧孔水口(45°)又优于喇叭形水口；牛鼻子水口和三孔水口比较各有特点，前者对保证铸坯质量有利，为防止流股对窄面的冲击，增加挡块宽度到100 mm，可使结晶器横截面上温度分布更加均匀，降低窄面热负荷；后者对增加流量，提高拉速非常有利，但要防止中孔射流过强导致铸坯中心坯壳变薄，在实际生产中可通过控制水口浸入深度或塞住浸入式水口的底孔来调节结晶器中的流动与温度分布状态。

Finally, the techniques of time-serial measurement for transient flow field, three-dimensiqonal tomography, computer image processing and the theories above quantitative calculation studied in the thesis are used to measure the free jet flow field of real rocket, the flow field of bore nozlle, impingment field of exhusted jet, three-dimensional flow field in hypersonic shock tunnel, the flow field of boundary layer transition, explosive and combustion flow field of detonating powder and 3-D temperature field.

最后，利用本文所研究的瞬态流场时间序列定量测试技术，三维C.T技术，计算机图像处理技术和定量计算理论等对真实火箭燃气射流场，膛口流场，燃气射流冲击场，高超音速激波风洞中的三维流场，模型边界层转捩区流场，起爆药爆轰流场和燃烧场、三维温度场等进行测试，取得了一些国际上首创性的成果，并对实现上发现的一些新现象进行理论分析和解释。

The invention aims to solve the problems of the prior W-shaped flame boiler adopting overfire air nozzles in direct flow structure form, such as higher carbon content in fly ash resulting from the fact that the gas and pulverized coal in the jet flow of the conventional boiler are unlikely to be mixed with those between adjacent jet flows due to the poor lateral diffusion capacity.

本发明的目的是为解决现有W型火焰锅炉燃尽风喷口采用的都是直流的结构形式，其射流的横向扩散能力较弱，无法与相邻射流之间的烟气和煤粉混合，造成飞灰含碳量偏高。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。