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Propeller hub cap fin optimization design method based on entropy production analysis

An optimized design and propeller hub technology, applied in the field of propeller hub cap fins, can solve problems such as optimization and improvement of hub cap fins, time-consuming and labor-intensive pool tests, etc., to achieve the effect of reducing entropy loss and good hydrodynamic performance

Pending Publication Date: 2022-01-28
KUNMING UNIV
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Problems solved by technology

However, although the data obtained by the model test is close to the real situation, the pool test is time-consuming and labor-intensive, and there is no way to optimize and improve the subsequent hub cap fins

Method used

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  • Propeller hub cap fin optimization design method based on entropy production analysis
  • Propeller hub cap fin optimization design method based on entropy production analysis
  • Propeller hub cap fin optimization design method based on entropy production analysis

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Embodiment 1

[0033] Such as figure 1 As shown, the method for optimizing the design of propeller hub cap fins based on entropy production analysis, its specific steps include:

[0034] Step 1. Determination of basic parameters: determine the working conditions for which the propeller needs to be optimally designed. The determined basic parameters are mainly the advance speed coefficient J of the propeller and the diameter D of the propeller; taking a certain type of four-blade propeller as an example, the diameter D of the propeller=250mm, Advance speed J=0.5, speed n=1200rpm;

[0035] The hub cap fin is designed with this propeller, and the constraint range is given for the hub cap fin blade diameter d and the hub cap fin blade installation angle α, and the constraint range is:

[0036] 0.2D≤d≤0.4D;

[0037] 20°≤α≤60°; the number of blades of the hubcap fin is consistent with the number of propeller blades;

[0038] Step 2, three-dimensional modeling: Carry out three-dimensional modeli...

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Abstract

The invention relates to a propeller hub cap fin optimization design method based on entropy production analysis, and belongs to the technical field of propeller hub cap fins. The method comprises the following steps that: the working condition that a propeller needs to be subjected to optimization design is determined, determined basic parameters are mainly the advancing speed coefficient J and the propeller diameter D of the propeller; a hub cap fin is designed by using the propeller, and a constraint range for the blade diameter d of the hub cap fin and the blade mounting angle alpha of the hub cap fin are given; three-dimensional modeling is separately carried out on the propeller and the propeller with the hub cap fin selected in the parameter constraint range; an obtained propeller and a propeller three-dimensional model with the hub cap fin in the parameter constraint range are imported into a fluid dynamics calculation model for simulation calculation; entropy production analysis is performed, whether a design target is reached or not is determined according to an optimization target value of entropy production; if the design target is not reached, design parameters are adjusted; and the process optimization is repeated until the design target is achieved. With the method adopted, the technical blank of a hub cap fin optimization design method is filled from the perspective of entropy production.

Description

technical field [0001] The invention relates to an optimal design method for propeller hub cap fins based on entropy production analysis, and belongs to the technical field of propeller hub cap fins. Background technique [0002] When a marine propeller rotates at high speed in water, strong vortices and cavitation will be generated behind the hub, which will reduce the propulsion efficiency of the propeller and increase the output energy consumption. For this kind of vortex and cavitation phenomenon, installing a hub cap fin with a certain angle and shape on the hub can reduce the influence of vortex and cavitation at the rear end of the hub, reduce the energy consumption of the entire propeller, and increase the propulsion efficiency. At present, in order to design the hubcap fins that match the propeller, it is often necessary to obtain relevant data by means of tank model tests. However, although the data obtained by the model test is close to the real situation, the po...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/28G06F111/04
CPCG06F30/15G06F30/28G06F2111/04
Inventor 宋科
Owner KUNMING UNIV
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