Hybrid Optimization Design of Natural-Laminar-Flow(NLF) Supercritical Airfoil and Infinite Swept Wing

2017 ◽  
Author(s):  
Tian-Lun Fan ◽  
Wen-Ping Song ◽  
Jing Chen ◽  
Zhong-Hua Han
Keyword(s):  
Laminar Flow ◽  
Optimization Design ◽  
Hybrid Optimization ◽  
Swept Wing ◽  
Supercritical Airfoil ◽  
Natural Laminar Flow

scholarly journals Discrete-Roughness-Element-Enhanced Swept-Wing Natural Laminar Flow at High Reynolds Numbers

AIAA Journal ◽  
2015 ◽  
Vol 53 (8) ◽  
pp. 2321-2334 ◽  
Author(s):  
Mujeeb Malik ◽  
Wei Liao ◽  
Fei Li ◽  
Meelan Choudhari
Keyword(s):  
Laminar Flow ◽  
Roughness Element ◽  
Reynolds Numbers ◽  
Swept Wing ◽  
High Reynolds Numbers ◽  
Natural Laminar Flow ◽  
High Reynolds

Hybrid Inverse/Optimization Design Approach for Transonic Natural-Laminar-Flow Airfoils

2019 ◽  
Author(s):  
Jiang-Bo Chi ◽  
Zhong-Hua Han ◽  
Tian-Lun Fan ◽  
Zhen Zhu ◽  
Wen-Ping Song
Keyword(s):  
Laminar Flow ◽  
Optimization Design ◽  
Inverse Optimization ◽  
Design Approach ◽  
Natural Laminar Flow

Natural Laminar-Flow Airfoil Optimization Design Using a Discrete Adjoint Approach

AIAA Journal ◽  
2020 ◽  
Vol 58 (11) ◽  
pp. 4702-4722 ◽  
Author(s):  
Yayun Shi ◽  
Charles A. Mader ◽  
Sicheng He ◽  
Gustavo L. O. Halila ◽  
Joaquim R. R. A. Martins
Keyword(s):  
Laminar Flow ◽  
Optimization Design ◽  
Airfoil Optimization ◽  
Discrete Adjoint ◽  
Natural Laminar Flow ◽  
Adjoint Approach

Optimization Design of Drawbead in Drawing Tools of Autobody Cover Panel

2002 ◽  
Vol 124 (2) ◽  
pp. 278-285 ◽  
Author(s):  
Gang Liu ◽  
Zhongqin Lin ◽  
Youxia Bao
Keyword(s):  
Optimization Algorithm ◽  
Optimization Design ◽  
Design Method ◽  
Experimental Results ◽  
Hybrid Optimization ◽  
Force Model ◽  
Hybrid Optimization Algorithm ◽  
Design Plan ◽  
Formed Part ◽  
Restraining Force

In the tooling design of autobody cover panels, design of drawbead will affect the distribution of drawing restraining force along mouth of dies and the relative flowing velocity of the blank, and consequently, will affect the distributions of strain and thickness in a formed part. Therefore, reasonable design of drawbead is the key point of cover panels’ forming quality. An optimization design method of drawbead, using one improved hybrid optimization algorithm combined with FEM software, is proposed in this paper. First, we used this method to design the distribution of drawbead restraining force along the mouth of a die, then the actual type and geometrical parameters of drawbead could be obtained according to an improved drawbead restraining force model and the improved hybrid optimization algorithm. This optimization method of drawbead was used in designing drawing tools of an actual autobody cover panel, and an optimized drawbead design plan has been obtained, by which deformation redundancy was increased from 0% under uniform drawbead control to 10%. Plastic strain of all area of formed part was larger than 2% and the minimum flange width was larger than 10 mm. Therefore, not only better formability and high dent resistance were obtained, but also fine cutting contour line and high assembly quality could be obtained. An actual drawing part has been formed using the optimized drawbead, and the experimental results were compared with the simulating results in order to verify the validity of the optimized design plan. Good agreement of thickness on critical areas between experimental results and simulation results proves that the optimization design method of drawbead could be successfully applied in designing actual tools of autobody cover panels.

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