阅读说明：本技术 喷水推进器流道 (Flow passage of water-jet propeller ) 是由 韩玉军 于 2020-04-20 设计创作，主要内容包括：流道,涉及喷水推进器流道内流场分布的关键核心技术,旨在消除泵体内流场的空泡、扰流发生,平顺流体,提高射流速度,进而最大程度的转换轴功率,提高轴向力。本发明使得喷水推进器流道内功率损失降到尽可能低,进一步使船舶的能效比改善成为可能。所提出的实现这一流道包括：一组由直线和曲线构成的收缩型流道截面。根据模型试验结果,所述流道技术在原动机的驱动下泵体流场内产生的液流,流场分布均匀、平顺,射流速度提高30%以上。(The flow channel relates to a key core technology of flow field distribution in the flow channel of the water-jet propeller, and aims to eliminate cavitation and turbulence of the flow field in a pump body, smooth fluid, improve jet speed, further convert shaft power to the maximum degree and improve axial force. The invention reduces the power loss in the flow channel of the water-jet propeller as low as possible, and further makes the improvement of the energy efficiency ratio of the ship possible. The proposed implementation of this flow channel comprises: and the group of contracted flow passage sections are formed by straight lines and curved lines. According to the model test result, the flow field of the liquid flow generated in the pump body flow field under the driving of the prime motor is uniformly and smoothly distributed by the flow channel technology, and the jet speed is improved by more than 30%.)

1. The flow path includes: and the group of contracted flow passage sections are formed by straight lines and curved lines.

2. The flow channel of claim 1, wherein: it has a convergent channel cross-section consisting of straight and curved lines.

3. A flow channel as claimed in claims 1 and 2, wherein: the ratio of h to h1 is 0.53-0.86, the ratio of h1 to h2 is more than 2.5, and the ratio of D to D is 0.53-0.89.

Technical Field

The invention relates to a key core technology of flow field distribution in a flow channel of a water-jet propeller.

Background

The water jet propeller is used as a leading-edge propulsion technology of modern ships, international main research institutions are invested in research without any residual force, and the water jet propeller makes it possible to obtain an energy efficiency ratio with more prominent advantages, a maximized axial force and solve the negative influence of a cavitation effect by means of continuous perfection of a fluid mechanics theory and practice and along with the maturity of a computer three-dimensional modeling and flow field simulation technology.

The global jet propulsion technology is still in the initial stage of market commercialization, and still has great technical problems in the aspects of flow passage, impeller, commutator and shaft power matching to be broken through.

Disclosure of Invention

The invention mainly aims to eliminate the occurrence of cavitation and turbulence of a flow field in a pump body, smoothen fluid, improve jet flow speed, further convert shaft power to the maximum extent and improve axial force.

The proposed implementation of this flow channel comprises: and the group of contracted flow passage sections are formed by straight lines and curved lines.

According to the model test result, the flow field of the liquid flow generated in the pump body flow field under the driving of the prime motor is uniformly and smoothly distributed by the flow channel technology, and the jet speed is improved by more than 30%.

The flow channel is characterized in that it has a convergent flow channel cross section consisting of straight lines and curved lines. The ratio of h to h1 is 0.53-0.86, the ratio of h1 to h2 is more than 2.5, and the ratio of D to D is 0.53-0.89.

Drawings

The essence of the invention is explained with 1 figure. Fig. 1 shows a cross-sectional view of a flow channel.

Detailed Description

The flow channel shown in fig. 1 includes: a section (1) formed by a straight line, a section (2) formed by a curve and a section (3) formed by a straight line; the fluid forms a rotary pressurized flow through the section (1), enters the section (2) for repressurization, and is ejected at a high speed through the section (3).

Industrial applicability

As indicated above, the invention aims to optimize the flow field distribution in the flow channel of the water jet propeller, realizes the theoretical research of field hydromechanics to the maximum extent, and is a key core component of the water jet propeller of the modern ship.