查询词典 jet-black

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A method and apparatus for increasing the propelling force of pulse engine features that the fuel nozzle of pulse explosion engine is arranged in combustion chamber to close jet tube exit, and the fuel is reversely sprayed out to generate a shock wave barrier near the jet tube for preventing the airflow from flowing out of the combustion chamber, resulting in raising the pressure in combustion chamber and in turn increasing the propelling force.

本发明公开了一种提高脉冲发动机推力的方法和装置，它是通过将脉冲爆轰发动机的燃料嘴置放在燃烧室中靠近喷管出口附近，并使燃料逆向喷出，在燃烧室内靠近喷管附近形成一道阻止气流流出燃烧室的激波，激波的作用是使燃烧室压力升高，从而的到较大的推力。同时由于本发明的结构特别的简单，所以实现非常容易，并且工作效果十分显著。

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。

According to the experiment, aeration performance of the jet aerators is gradually increased when the water becoming deeper. The aeration performance of the jet aerators is the best at the depth of 4.5 meter.

在清水实验中，设置了4个测试断面，通过实验可知射流器随着水深的增加充氧性能逐渐提高。

The production line for both three layer PE pipe and epoxy powder inner anticorrosion pipe came from the reformation of an original production line of three layer PE pipe. The main problems to have been solved are as follows, convert the conventional spray gun deflector into two parts of diversion nozzle and gun wick to suit for different pipe diameters; adopt two stage retrieval equipment to increase powder retrieval rate and improve work environment; enlarge the calibres of gas jet and Venturi pump jet to increase powder output 20% above to ensure the spry coating thickness; design gun pushing device to raise automatic production level.

三层PE管和环氧粉末内防腐管兼容生产线是在三层PE管生产线的基础上改造而成的，主要解决了如下技术问题：将常规使用的喷枪导流体改成导流嘴和枪芯两部分，以适应喷涂不同直径钢管的需要；采用双级回收装置，提高粉末回收率，改善作业环境；加大一次气喷嘴和文丘里泵喷嘴的口径，使出粉量增加20%以上，从而保证涂层喷涂的厚度；设计推枪装置，提高生产的自动化程度。

High pressure water jet is a new kind of technology used for cleaning and cutting developed in recent twenty years with self-resonating cavitating water jet being one of the most advanced and efficient.

自振空化射流是近年来发展起来的一种新型高效射流，用这种射流处理炮孔和近井地层的研究在国内外还是空白。

Result shows that ambient pressures have a significant effect on rock breaking by common continuous water jet and cavitating jet.

但是，井筒中由流体静液柱压力形成的围压一般都大于10 MPa，属于高围压。

Selfresonant cavitating jet is a kind of modulated jet with significant impact pressure fluctuations and cavitation effects.

自振空化射流是利用瞬态流和水声学原理调制而成的一种新型射流，本文研究了自振空化射流在常压及围压下的压力脉动特性及其参数影响规律。

With advanced ring spinners 50,000 spindles, imported jet spinners 800 heads, and combers 20 sets, it produces annually 7,800 t of cotton yarn including ring-spun yarn combed yarn-30S-40S and carded yarn- 32S-60S, jet-spun yarn 6S-12S.

现拥有先进的环锭纺设备5万锭，进口气流纺800头，精梳机20台，年生产棉纱7800吨，生产的品种有环锭纺普梳30S-40S、精梳32S-60S、气流纺纱6S-12S。

Results indicate that the height of maximum horizontal wind velocity is correlative with the horizontal position. The downburst intensity and jet diameter have rather small effects on the test results in a certain range. Nevertheless, the jet height and obliquity can affect the flow field of downburst significantly.

研究结果表明：最大水平风速出现的高度与其水平位置有关；射流速度V与射流直径D在一定范围内对试验结果影响不大；射流高度h与入射倾角α对冲击风的流场有明显影响。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。