Integrated Optimization Design for a Radial Turbine Wheel of a 100kW-Class Microturbine

2011 ◽  
Author(s):  
Lei Fu ◽  
Yan Shi ◽  
Qinghua Deng ◽  
Huaizhi Li ◽  
Zhenping Feng
Keyword(s):  
Optimization Design ◽  
Design Method ◽  
Aerodynamic Performance ◽  
Original Design ◽  
Element Analysis ◽  
Turbine Wheel ◽  
Strength Performance ◽  
Integrated Optimization ◽  
Radial Turbine ◽  
Integrated Optimization Design

The aerodynamic performance, structural strength and wheel weight are three important factors in the design process of the radial turbine. This paper presents an investigation on these aspects and develops an optimization design approach for radial turbine with consideration of the three factors. The aerodynamic design for the turbine wheel with inlet diameter of 230mm for 100kW-class microturbine unit is carried out firstly as the original design. Then, the cylinder parabolic geometrical design method is applied to the wheel modeling and structural design, but the maximum stress predicted by Finite Element Analysis greatly exceeds the yield limit of material. Furthermore, the wheel weight is above 7.2kg thus bringing some critical difficulties for bearing design and turbine operation. Therefore, an integrated optimization design method for radial turbine is studied and developed in this paper with focus on the wheel design. Meridional profiles and shape lines of turbine wheel are optimized with consideration of the whole wheel weight. Main structural modeling parameters are reselected to reduce the wheel weight. Trade-off between aerodynamic performance and strength performance is highly emphasized during the optimization design. The results show that the optimized turbine wheel gets high aerodynamic performance and acceptable stress distribution with the weight less than 3.8kg.

Integrated Optimization Design for a Radial Turbine Wheel of a 100 kW-Class Microturbine

2011 ◽  
Vol 134 (1) ◽  
Author(s):  
Lei Fu ◽  
Yan Shi ◽  
Qinghua Deng ◽  
Huaizhi Li ◽  
Zhenping Feng
Keyword(s):  
Optimization Design ◽  
Design Method ◽  
Aerodynamic Performance ◽  
Original Design ◽  
Element Analysis ◽  
Turbine Wheel ◽  
Strength Performance ◽  
Integrated Optimization ◽  
Radial Turbine ◽  
Integrated Optimization Design

The aerodynamic performance, structural strength, and wheel weight are three important factors in the design process of the radial turbine. This paper presents an investigation on these aspects and develops an optimization design approach for radial turbine with consideration of the three factors. The aerodynamic design for the turbine wheel with an inlet diameter of 230 mm for the 100 kW-class microturbine unit is carried out first as the original design. Then, the cylinder parabolic geometrical design method is applied to the wheel modeling and structural design, but the maximum stress predicted by finite element analysis greatly exceeds the yield limit of material. Further, the wheel weight is above 7.2 kg, thus, bringing some critical difficulties for bearing design and turbine operation. Therefore, an integrated optimization design method for radial turbine is studied and developed in this paper with focus on the wheel design. Meridional profiles and shape lines of the turbine wheel are optimized with consideration of the whole wheel weight. Main structural modeling parameters are reselected to reduce the wheel weight. Trade-off between aerodynamic performance and strength performance is highly emphasized during the optimization design. The results show that the optimized turbine wheel gets high aerodynamic performance and acceptable stress distribution with a weight less than 3.8 kg.

An Integrated Optimization Design Method Based on Surrogate Modeling Applied to Diverging Duct Design

2016 ◽  
Vol 33 (4) ◽  
Author(s):  
Lu Hanan ◽  
Li Qiushi ◽  
Li Shaobin
Keyword(s):  
Genetic Algorithm ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Optimization Design ◽  
Design Method ◽  
Uniform Design ◽  
Qualitative Variable ◽  
Integrated Optimization ◽  
Design Variables ◽  
Integrated Optimization Design

AbstractThis paper presents an integrated optimization design method in which uniform design, response surface methodology and genetic algorithm are used in combination. In detail, uniform design is used to select the experimental sampling points in the experimental domain and the system performance is evaluated by means of computational fluid dynamics to construct a database. After that, response surface methodology is employed to generate a surrogate mathematical model relating the optimization objective and the design variables. Subsequently, genetic algorithm is adopted and applied to the surrogate model to acquire the optimal solution in the case of satisfying some constraints. The method has been applied to the optimization design of an axisymmetric diverging duct, dealing with three design variables including one qualitative variable and two quantitative variables. The method of modeling and optimization design performs well in improving the duct aerodynamic performance and can be also applied to wider fields of mechanical design and seen as a useful tool for engineering designers, by reducing the design time and computation consumption.

An integrated optimization design of a fishing ship hullform at different speeds

2018 ◽  
Vol 30 (6) ◽  
pp. 1174-1181 ◽  
Author(s):  
Lei Yang ◽  
Sheng-zhong Li ◽  
Feng Zhao ◽  
Qi-jun Ni
Keyword(s):  
Optimization Design ◽  
Integrated Optimization ◽  
Integrated Optimization Design

Study on Mechanics Properties of Automobile Rear Axle Shell and Optimization Design in Manufacturing System

2012 ◽  
Vol 252 ◽  
pp. 298-301
Author(s):  
Xin Li Bai ◽  
Ying Fang Zhang ◽  
Ya Wei Zhao
Keyword(s):  
Finite Element ◽  
Cross Section ◽  
Optimization Design ◽  
Manufacturing System ◽  
Rear Axle ◽  
Large Strain ◽  
Displacement Curve ◽  
Original Design ◽  
Load Curve ◽  
Element Analysis

The mechanics properties of a certain automobile rear axle shell were studied and a large displacement, large strain elastoplastic finite element analysis was carried out. and the followings were obtained: the load-displacement curve at loading point, elastoplastic strain-load curve at the maximum stress point, elastoplastic stress-load curve in dangerous cross-section, and the yielding load at which the dangerous cross-section overall yield. The results show that elastoplastic finite element simulation results are much closer to the experimental corresponding results. Through optimization design in manufacturing system, the weight of the rear axle shell is greatly reduced as compared with the original design. Optimal design not only saves materials and reduces cost, but also greatly reduces the design time. The calculation results provide the necessary data for automobile rear axle design, strength evaluation and fatigue life estimate.

The Study of Optimization Design Numerical Simulation on Variable Spacing Pile-Raft Foundation

2013 ◽  
Vol 353-356 ◽  
pp. 941-945
Author(s):  
Wei Yu Wang ◽  
Tuo Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Optimization Design ◽  
Analysis Model ◽  
Analysis Software ◽  
Original Design ◽  
Element Analysis ◽  
Pile Diameter ◽  
Raft Foundation ◽  
Practical Engineering

Based on practical engineering, numerical analysis model was established by using finite element analysis software. The rules about raft settlement, pile-top counterforce, soil counterforce were analysed after variable pile diameter. It is more favorable on settlement and counterforce after variable pile diameter than Original design. There is important academic significance and application value on pile raft foundation optimal design.

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