POD (proper orthogonal decomposition) and surrogate model based order reduction method for hypersonic aerodynamic thermal models

A hypersonic and surrogate model technology, applied in the aerospace field, can solve problems that cannot be well adapted to engineering applications, achieve the effects of shortening the design cycle, improving design efficiency, and broad application prospects

Inactive Publication Date: 2014-07-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the current hypersonic aerothermal engineering calculation and high-precision numerical calculation can not be well adapted to the current engineering application, combining the basic idea of ​​the POD method and the surrogate model, using the POD method to obtain the POD basis of the reduced-order system The modal and surrogate model methods deal with the approximate relationship between projection coefficients and sample points in the reduced-order system base mode, and propose a model reduction method (POD) that combines intrinsic orthogonal decomposition (POD) and surrogate model technology (Surrogate) -Surrogate), and successfully applied to hypersonic aerothermal prediction

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  • POD (proper orthogonal decomposition) and surrogate model based order reduction method for hypersonic aerodynamic thermal models
  • POD (proper orthogonal decomposition) and surrogate model based order reduction method for hypersonic aerodynamic thermal models
  • POD (proper orthogonal decomposition) and surrogate model based order reduction method for hypersonic aerodynamic thermal models

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Embodiment Construction

[0031] Take the wing of a typical F104 fighter commonly used in aerothermoelastic analysis (see the geometric model of the wing structure in figure 2 , the computational fluid grid model of the wing see image 3 As an example, the CFD-FASTRAN solver is used to calculate the temperature distribution of the airfoil, and the POD-Surrogate method of the present invention is used to construct the reduced-order model of the aerodynamic heat of the airfoil, and the efficiency and accuracy of the method are further analyzed.

[0032] Step 1: Selection of physical model. Hypersonic vehicles mostly use slender bodies, lifting bodies or waveriders, and aerothermoelastic analysis pays more attention to the dynamic and static stability of wings or rudder surfaces. The present invention takes the wing of a typical F104 fighter commonly used in aerodynamic thermoelastic analysis as an example, and the relevant geometric parameters are as follows: figure 2 shown.

[0033] Step 2: Determi...

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Abstract

The invention relates to a POD (proper orthogonal decomposition) and surrogate model based order reduction method for hypersonic aerodynamic thermal models and belongs to the technical field of aerospace. A hypersonic aircraft aerodynamic thermal environment is predicted and obtained by the aid of a POD and surrogate model method, nonlinear characteristics of real gas effect, turbulence viscosity and the like of high-precision numerical calculation are reserved, the hypersonic aircraft aerodynamic thermal environment can be provided for design of the hypersonic aerocraft by the aid of model order reduction method which is high in precision and efficiency, related thermal boundary conditions are provided for aerodynamic thermal elastic design, the thermal environment is provided for thermal protection design of the hypersonic aerocraft, design efficiency can be greatly improved, design circle is shortened, and design cost is reduced.

Description

technical field [0001] The invention relates to a hypersonic aerothermal model reduction method based on intrinsic orthogonal decomposition (POD) and surrogate models, and belongs to the technical field of aerospace. Background technique [0002] Aerospace technology is the main symbol of modern human civilization and the concentrated expression of a country's scientific and technological level and comprehensive national strength. Hypersonic technology is an important part of the aerospace field and an important development direction of current and future aerospace technology. But now, all countries in the world are starting to study hypersonic technology, have formulated hypersonic technology development plans, and have successively made the development of hypersonic aircraft a national goal to achieve. [0003] A hypersonic vehicle generally refers to an aircraft whose flight Mach number is greater than 5, and which can achieve hypersonic flight in the atmosphere and acro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 刘莉陈鑫岳振江周思达
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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