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Pneumatic prediction method with combination of CFD numerical simulation and wind tunnel test

A technology of wind tunnel test and numerical simulation, which is applied in aerodynamic test, measuring device, machine/structural component testing, etc., can solve the problems that the advantages of numerical simulation and wind tunnel test cannot be fully utilized, so as to improve design efficiency, The effect of saving time and reducing design cost

Active Publication Date: 2015-12-02
CHINA ACAD OF AEROSPACE AERODYNAMICS
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AI Technical Summary

Problems solved by technology

This method treats numerical simulation and test methods separately, and cannot give full play to the advantages of numerical simulation and wind tunnel test.

Method used

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  • Pneumatic prediction method with combination of CFD numerical simulation and wind tunnel test
  • Pneumatic prediction method with combination of CFD numerical simulation and wind tunnel test
  • Pneumatic prediction method with combination of CFD numerical simulation and wind tunnel test

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specific Embodiment

[0039] The specific embodiment of this method is described by taking the example of aerodynamic prediction combining the CFD numerical simulation data of a certain transport aircraft and the wind tunnel test.

[0040] The relevant parameters of a civil transport aircraft are shown in Table 1:

[0041] Table 1

[0042] parameters

value

Range (km)

2600

Cruising Mach number

0.78

Cruising altitude (m)

10,668-11,887

number of engines

2

number of passengers

110

Landing field length (m)

1,450

Take-off field length (m)

1,550

Fuselage length (m)

36

Length (m)

30

Wing area (square meter)

105

[0043] looks like figure 2 As shown, the aircraft is in the shape of a line machine, with a conventional layout, the engine is in the form of a wing hanger, and the wing tips are equipped with winglets.

[0044] Applying the method in the present invention to carry o...

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Abstract

The invention provides a pneumatic prediction method with the combination of CFD numerical simulation and a wind tunnel test. A data fusion method is employed, firstly the result of the CFD numerical simulation is used to establish an aircraft aerodynamic performance model, wind tunnel test data is used to modify the aircraft aerodynamic performance model, the modified aerodynamic performance model is used to estimate all samples, and finally a group of data with correct trend and the numerical accuracy of a wind tunnel amount level is obtained. According to the prediction method, while the wind tunnel data accuracy of the prediction result is ensured, the overall pneumatic prediction cost of an aircraft in the development process is reduced significantly, and the requirement of the aircraft pneumatic performance prediction is satisfied to the maximum extent.

Description

technical field [0001] The invention relates to an aerodynamic prediction method, in particular to an aerodynamic prediction method combining CFD (computational fluid dynamics) numerical simulation and wind tunnel test, and belongs to the field of aircraft aerodynamic shape design. Background technique [0002] In the initial design stage of an aircraft, it is necessary to predict whether its aerodynamic performance meets the design specifications. A large number of various aircrafts have emerged at home and abroad, and the coexistence of conventional aircraft and unconventional aircraft poses a challenge for quickly and accurately predicting the aerodynamic performance of aircraft in the concept and initial design stages. Among them, numerical simulation and wind tunnel test are two common means of predicting the aerodynamic performance of aircraft. Predicting the aerodynamic performance of aircraft through numerical simulation and wind tunnel test has its own advantages a...

Claims

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Application Information

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IPC IPC(8): G01M9/00
Inventor 王永志李锋李志国李广佳
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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