Ship thermal characteristic numerical simulation method

A technology of numerical simulation and thermal characteristics, applied in CAD numerical modeling, geometric CAD, computer-aided design, etc., can solve problems such as changes, inability to consider the thermal characteristics of the hull surface, etc., and achieve the effect of accurate thermal characteristics calculation results

Pending Publication Date: 2022-04-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the mainstream commercial software can only simulate the influence of unilateral factors (such as solar radiation) on the surface of the hull, and cannot consider the change of thermal characteristics of the hull surface in complex environments.

Method used

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  • Ship thermal characteristic numerical simulation method
  • Ship thermal characteristic numerical simulation method
  • Ship thermal characteristic numerical simulation method

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Embodiment

[0035] Such as figure 2 As shown, the specific process of the embodiment of the present invention includes:

[0036] The direction of the hull is determined in the Cartesian coordinate system, and the grid unit information is obtained after the hull model is divided into grids; the grid unit division of the hull model is as follows image 3 As shown, in this method, the positive direction of the x-axis of the Cartesian coordinate system is the due east direction, and the positive direction of the y-axis is the due north direction;

[0037] Input relevant parameters for the software to read and calculate, specifically including: the latitude of the ship’s area, the number of days in a year on the day of calculation, ambient temperature, sea surface temperature, temperature inside the ship, emissivity of hull materials, specific heat capacity, density, thickness, and external convection Thermal coefficient and internal convective heat transfer coefficient.

[0038] Calculate ...

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Abstract

The invention discloses a ship thermal characteristic numerical simulation method. The method belongs to the field of thermal characteristic simulation, and specifically comprises the steps of 1, dividing ship model grids, 2, establishing a ship thermal characteristic mathematical model, 3, solving a grid unit thermal balance equation, and 4, processing a numerical calculation result. Performing temperature or heat flux density assignment on each grid unit of the ship body model to obtain the temperature or heat flux density distribution condition of the whole ship; according to the ship thermal characteristic numerical simulation method provided by the invention, the thermal influence of multiple factors such as direct solar radiation, scattered solar radiation, sky radiation, sea surface radiation, sea surface reflection, external radiation of the ship body, external convective heat transfer and internal convective heat transfer on the ship body is comprehensively considered; the temperature and heat flux density distribution condition of the outer surface of the ship body can be predicted in advance, and compared with most of existing commercial software, the numerical simulation method can obtain a more accurate thermal characteristic calculation result.

Description

technical field [0001] The invention belongs to the field of thermal characteristic simulation and relates to a method for numerical simulation of ship thermal characteristics. Background technique [0002] In the prior art, all objects with a temperature higher than absolute zero will emit heat radiation to the outside, and the heat radiation is generated by the thermal movement of microscopic particles inside the object. According to the Stepan-Boltzmann law, when an object is regarded as a black body, its radiation force is proportional to the fourth power of its thermodynamic temperature, so the higher the temperature of the object, the stronger the radiation. The thermal radiation emitted by objects is composed of continuous electromagnetic waves of different wavelengths, among which, electromagnetic waves with wavelengths in the spectrum range of 1.0-1000.0 μm are called infrared radiation. Infrared detection technology for infrared radiation has been widely used in g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F111/10G06F119/08
Inventor 邹燚涛孔犇犇徐鑫甜杨凯杰潘加爽蒋彦龙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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