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Parameterized design method for water inlet flow channel of water jet propeller of ship

A water jet propulsion, parametric design technology, applied in the direction of instrumentation, calculation, electrical digital data processing, etc., can solve the problems of limited design effect, large dependence on experience, high cost, etc., to achieve flexible shape adjustment, flexible design, good Effect of Flow Properties

Inactive Publication Date: 2010-12-01
NAVAL UNIV OF ENG PLA
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AI Technical Summary

Problems solved by technology

The traditional design method has a long cycle, high cost, great dependence on experience, and limited design effect

Method used

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  • Parameterized design method for water inlet flow channel of water jet propeller of ship
  • Parameterized design method for water inlet flow channel of water jet propeller of ship
  • Parameterized design method for water inlet flow channel of water jet propeller of ship

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Effect test

Embodiment Construction

[0027] (1) Construction of the two-dimensional structure of the water inlet channel

[0028] The two-dimensional geometric model of the water inlet channel is described and constructed using 14 parameters, such as image 3 shown. The shape of the runner is achieved by adjusting the values ​​of these control parameters.

[0029] The macroscopic profile of the runner is described and constructed using three parameters: the outlet diameter D of the runner, the height H of the runner, and the total longitudinal length L of the runner. The outlet diameter of the runner is controlled by adjusting the value of parameter D, the height of the runner is controlled by adjusting the value of parameter H, and the total longitudinal length of the runner is controlled by adjusting the value of L. The values ​​of these three parameters directly determine the spatial position of the flow channel in the stern of the ship, which generally needs to be given in conjunction with the allowable con...

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Abstract

The invention relates to a parameterized design method for a water inlet flow channel of a water jet propeller of a ship. In the method, 18 associated parameters are used for describing and constructing a three-dimensional geometric structure of a flat inlet type water inlet flow channel, wherein 3 parameters are used for constructing an integral outline of a two-dimensional structure of the flow channel; 11 parameters are used for constructing a local shape of the two-dimensional structure of the flow channel; 2 parameters are used for confirming the water inlet shape of the flow channel; and 2 parameters are used for confirming a tail oblique angle and a side oblique angle of the flow channel. Areas with complex flow, such as a junction area of the back of the flow channel and a ship hull, a lip of the flow channel, and the like are constructed by adopting a Bezier curve. The three-dimensional geometric shape of the water inlet flow channel can be flexibly controlled by adjusting the 18 parameters. The combination of the geometric parameterized modeling of the flow channel and fluid dynamic performance numerical calculation can realize the rapid design of the water inlet channel with comprehensive and optimal fluid dynamic performance. Compared with the traditional design method, the parameterized design method has short design period, low cost and good effect.

Description

1. Technical field [0001] The invention relates to the design of a flat-inlet water inlet channel of a ship's water jet propeller, which can realize the rapid design of the water inlet channel with excellent hydrodynamic performance. 2. Background technology [0002] The water inlet channel is the flow passage for the waterjet propeller to absorb water from the bottom of the ship, and its hydrodynamic performance has a significant impact on the propulsion performance of the waterjet propeller. Whether the hydrodynamic performance of the water inlet channel is superior or not not only affects the flow loss in the channel, which obviously affects the utilization of incoming kinetic energy by the waterjet propulsion and the propulsion efficiency of the propulsion system, but also significantly affects the unobstructed degree of water flow at the bottom of the ship entering the waterjet propulsion pump And the quality of the outflow significantly affects the anti-cavitation perf...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 丁江明王永生
Owner NAVAL UNIV OF ENG PLA
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