查询词典 ram jet engine

WATER IN THE FORM OF A JET IS ONLY REQUIRED TO COMBAT A FIRE THAT CANNOT BE REACHED BY A SPRAY OR WHERE THE FORCE OF A JET IS NEEDED TO BREAK UP MATERIAL IN A DEEP SEATED FIRE SUCH AS MAY BE FOUND IN A HOLD FIRE.

水柱灭火只是用来灌救水雾灭火不能达到之火警，或是须要一支强的水柱去冲散位於深处的著火物体，例如货舱火警。

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。

Jet flow ; rocket motor ; double nozzle jet ; computational fluid dynamics

燃气射流；火箭发动机；双喷管射流；计算流体力学

The present objective is to evaluate the possibility of installing pump jet on fishing vessels, including simulation of flow field near the pump jet, comparison with traditional propeller on issues of tangling, and life-cycle cost for typical Taiwanese fishing methods.

本研究目标是评估泵喷推进器用於渔船上的可行性，包括泵喷推进器出入口流场模拟、泵喷推进器与传统螺桨绞缠性能的比较、台湾渔船使用情形下成本效益之评估，也针对一般的台湾渔船，进行改用泵喷推进器的初步线型与安装设计并比较其静水性能与稳度影响。

In this paper, an idea is presented about a larger pressure of percolation flow existed in a part of rock by a high-pressure jet, and the pressure has great effect on the rock fragmentation with jet. A model of calculating the pressure is established.

本文提出了射流作用下岩石局部范围具有较高渗流压力的思想，并认为该渗流压力大小对射流破岩有重要影响，建立了该渗流压力的计算模型。

The numerical results of water jet breaking rock agree with the experimental conclusion. A valid approach to the process of water jet breaking rock sh...

数值计算的结果较真实地反映了水射流破岩过程中岩石的动态响应以及水射流动力学特性的演化过程，并与相关试验规律吻合良好，这表明该分析方法是有效的，可用来指导高压水射流破岩理论的进一步研究及应用。

Based on the study on the mechanism of mechanical tool cutting rock with water jet assisted, the optimal jet position relating to pdc bit is attained.

本文正是从这一思路出发，对水射流辅助PDC刀具切割破碎硬及特硬岩石进行了理论和实验研究。

The high-pressure jet is applied widely to the fragmentation of the rock in drilling engineering, but the mechanism of rock fragmentation with jet is not very clear by now.

高压射流辅助破岩在油气井钻井工程中得到广泛应用，其破岩机理还很不明了。

In the process of impact of abrasive jet on rock, resulting dynamic stress plays an important role in rock destruction. The stress wave resulted makes local rock tensile and shearing, then makes rock destructed. In the conditions of some hypotheses, the mechanical model that rock is applied by stress wave, i.e. jet wave basic equations, are set up by wave theory, and the formula of the maximum normal stress resulted by stress wave is deduced according to known boundary conditions.

描述了岩石材料在磨料射流的冲击下破坏的主要原因，分析了应力波就是岩石局部受到拉伸和剪切并最终使岩石发生破坏的根本因素，在这一假设的前提下采用波动理论建立了岩石受应力波作用的力学模型即射流波动的基本方程，在已知的边界条件下推导出了由波动引起的最大正应力的计算公式。

On the base of above models and theories, three new kinds of bits, i.e. extended nozzle roller bit, self\|resonating water jet bit and combined jet and mechanical rock\|cutting bit, are developed.

当时 ，部分学者片面认为水射流的压力越高越好，日本研究出 170 0MPa的增压器，前苏联和美国研究出 56 0 0MPa的脉冲射流发生器。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。