喷射推进器

This paper gives the result of an experimental study and analyses about pump jet low frequency line spectra.

给出泵喷射推进器低频线谱的实验研究及分析结果。

On the basis of analyzing pump-jet propulsor, inside flow fields are numerically simulated by using the software FLUENT, on the condition of setting up the physical models and the mathematic models and determining the boundary conditions.

在分析泵喷射推进器的基础上，建立了其数值仿真的物理模型和数学模型，确定了求解的边界条件，利用CFD软件FLUENT对泵喷射推进器的内流场进行了数值仿真。

The velocity distributions and the surface pressure distributions of rotor blades and stator blades are acquired, furthermore, the efficiency and the thrust of the pump-jet propulsor are calculated, to lay foundation for the design and the optimization of pump-jet propulsors.

获得了泵喷射推进器转子叶片和定子叶片上的速度分布及其表面压力分布，并由此计算了泵喷射推进器的效率和所产生的推力，为泵喷射推进器的设计及其优化打下了基础。

Wash Down 清洗 3.14.1 Water for the washdown sprays is provided by a water boost pump with precharged hydraulic accumulator and high/low pressure switch.

清洗水的喷射时通过一个带有水压推进器和高/低压力开关的水泵来实现的。

In this paper, a study is made of the fluid motion equations for water flow within the jet tube of the propeller, and of the control scheme using a microcomputer in accordance with the navigating requirement.

本文是对水流在喷射推进器的喷射筒内的流体运动方程以及根据船舶航行要求对喷射推进器应采取的微机控制措施的初步探讨。

This paper presents and theoretically analyses the design of a marine jet propeller riven byimpulsing current. This new Propeller has obviously a higher efficency in energy-saving and a higher speed than any other propellers available.

本文提出了船舶冲击电流喷射推进器的设想，并从理论上分析了这种设想在节能效果和提高船舶航速方面具有比螺旋桨推进器明显优越的特性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。