Development of 3D Parameterized Design System for Turbine Compressor Impellers

2006 ◽  
Vol 532-533 ◽  
pp. 737-740
Author(s):  
Hang Gao ◽  
Jia Peng Yu ◽  
Xue Shu Liu
Keyword(s):  
Programming Language ◽  
High Efficiency ◽  
Three Dimensional ◽  
3D Models ◽  
Database Management System ◽  
Sql Server ◽  
Design Parameters ◽  
Design System ◽  
Parameterized Design ◽  
Engineering Drawings

Aiming at the characteristics of turbine compressor’s impellers, such as complexity in surface, assembled structure and variety in parameter, the step-by-step design thought is put forward, which realizes the high efficiency and visualization of parameterized design through distributing design parameters evenly to several phases or interfaces. According to the demand of the enterprise, SolidWorks CAD Software was chosen as the three-dimensional CAD platform, SQL Server 7.0 was chosen as the database management system, and Visual C++ was chosen for the programming language of secondary developing. Then the parameterized design system for series turbine compressor impellers is developed, which realizes automatic creation of 3D models and 2D engineering drawings using template technique.

Collaborative Design System for Electromechanical Products

1996 ◽  
Author(s):  
Noboru Narikawa ◽  
Kazuo Takahashi
Keyword(s):  
Collaborative Design ◽  
Three Dimensional ◽  
3D Models ◽  
Information Management System ◽  
Design System ◽  
3D Cad ◽  
Cad System ◽  
Essential Components ◽  
Electromechanical Products

Abstract This paper gives an overview of a collaborative design system (CDS) for electromechanical products. To reduce design costs and to manufacture high-quality products, it is well known that concurrent engineering (CE) is a very efficient approach. Three-dimensional (3D) CAD system and engineering database system are essential components of CE. The CDS is an environment to realize CE. By creating 3D models in a computer and performing some simulations such as mechanical, electronic, software simulation and integrated simulations, it is possible to estimate functions, assemblability, manufacturability and so on, before making prototype models. In this paper, we outline the CDS and mainly discuss the total information management system (TIMS) which makes an important role of the CDS. This paper describes the implementation experience of some functions of the TIMS.

Non-Dimensional Parameters for Comparing Conventional and Counter-Rotating Turbomachines

2019 ◽  
Author(s):  
J. J. Waldren ◽  
C. J. Clark ◽  
S. D. Grimshaw ◽  
G. Pullan
Keyword(s):  
High Efficiency ◽  
Three Dimensional ◽  
Relative Performance ◽  
Design Parameters ◽  
Blade Design ◽  
Finite Radius ◽  
Counter Rotation ◽  
Dimensional Parameters ◽  
Conventional Machine ◽  
Stage Efficiency

Abstract Counter-rotating turbomachines have the potential to be high efficiency, high power density devices. Comparisons between conventional and counter-rotating turbomachines in the literature make multiple and often contradicting conclusions about their relative performance. By adopting appropriate non-dimensional parameters, based on relative blade speed, the design space of conventional machines can be extended to include those with counter-rotation. This allows engineers familiar with conventional turbomachinery to transfer their experience to counter-rotating machines. By matching appropriate non-dimensional parameters the loss mechanisms directly affected by counter-rotation can be determined. A series of computational studies are performed to investigate the relative performance of conventional and counter-rotating turbines with the same non-dimensional design parameters. Each study targets a specific loss source, highlighting which phenomena are directly due to counter-rotation and which are solely due to blade design. The studies range from two-dimensional blade sections to three-dimensional finite radius stages. It is shown that, at hub-to-tip ratios approaching unity, with matched non-dimensional design parameters, the stage efficiency and work output are identical for both types of machine. However, a counter-rotating turbine in the study is shown to have an efficiency advantage over a conventional machine of up to 0.35 percentage points for a hub-to-tip ratio of 0.65. This is due to differences in absolute velocity producing different spanwise blade designs.

Design of a High-Performance Axial Compressor for Utility Gas Turbine

1992 ◽  
Vol 114 (2) ◽  
pp. 277-286 ◽  
Author(s):  
A. Sehra ◽  
J. Bettner ◽  
A. Cohn
Keyword(s):  
Gas Turbine ◽  
High Performance ◽  
High Efficiency ◽  
Guide Vane ◽  
Design Flow ◽  
Design Parameters ◽  
Design System ◽  
Inlet Guide Vane ◽  
Variable Geometry ◽  
Compressor Design

An aerodynamic design study to configure a high-efficiency industrial-size gas turbine compressor is presented. This study was conducted using an advanced aircraft engine compressor design system. Starting with an initial configuration based on conventional design practice, compressor design parameters were progressively optimized. To improve the efficiency potential of this design further, several advanced design concepts (such as stator ends bends and velocity controlled airfoils) were introduced. The projected poly tropic efficiency of the final advanced concept compressor design having 19 axial stages was estimated at 92.8 percent, which is 2 to 3 percent higher than the current high-efficiency aircraft turbine engine compressors. The influence of variable geometry on the flow and efficiency (at design speed) was also investigated. Operation at 77 percent design flow with inlet guide vanes and front five variable stators is predicted to increase the compressor efficiency by 6 points as compared to conventional designs having only the inlet guide vane as variable geometry.

scholarly journals Three-dimensional dental topography and feeding ecology in the extinct cave bear

2020 ◽  
Vol 16 (12) ◽  
pp. 20200792
Author(s):  
Alejandro Pérez-Ramos ◽  
Alejandro Romero ◽  
Ernesto Rodriguez ◽  
Borja Figueirido
Keyword(s):  
Feeding Behaviour ◽  
Giant Panda ◽  
Ursus Arctos ◽  
High Efficiency ◽  
Three Dimensional ◽  
Shape Descriptor ◽  
3D Models ◽  
Ailuropoda Melanoleuca ◽  
Feeding Preferences ◽  
Cave Bear

The cave bear ( Ursus spelaeus s.l .) was an iconic extinct bear that inhabited the Pleistocene of Eurasia. The cause of extinction of this species is unclear and to identify the actual factors, it is crucial to understand its feeding preferences. Here, we quantified the shape descriptor metrics in three-dimensional (3D) models of the upper teeth (P 4 –M 2 ) of the cave bear to make inferences about its controversial feeding behaviour. We used comparative samples, including representatives of all living bear species with known diets, as a template. Our topographic analyses show that the complexity of upper tooth rows in living bears is more clearly associated with the mechanical properties of the items consumed than with the type of food. Cave bears exhibit intermediate values on topographic metrics compared with the bamboo-feeder giant panda ( Ailuropoda melanoleuca ) and specialists in hard mast consumption ( Ursus arctos and Ursus thibetanus ). The crown topography of cave bear upper teeth suggests that they could chew on tough vegetal resources of low quality with high efficiency, a characteristic that no living bear currently displays. Our results align with a climate-driven hypothesis to explain the extinction of cave bear populations during the Late Pleistocene.

Optimization of the intake port shape for a five-valve gasoline engine

2001 ◽  
Vol 215 (6) ◽  
pp. 739-746 ◽  
Author(s):  
K Lee ◽  
C Lee ◽  
Y Joo
Keyword(s):  
High Efficiency ◽  
Gasoline Engine ◽  
Three Dimensional ◽  
Design Guidelines ◽  
Design Parameters ◽  
Computer Assisted ◽  
Intake Port ◽  
Port Design ◽  
Visualization Experiments ◽  
Valve Engine

For the development of a high efficiency gasoline engine, the optimization of the intake port shape for a five-valve engine has been studied. Intake multivalve cylinder heads were manufactured by using a three-dimensional computer-assisted design program, and steady state flow experiments and flow visualization experiments have been performed with these cylinder heads. The five-valve engines, which have larger valve opening areas, have larger intake flowrates and higher tumble ratios than the four-valve engines. The effects of intake port design parameters of a five-valve engine on the intake flowrate and tumble were studied, and the design guidelines for the five-valve engines were established.

Development of Parameterized Design System of Auto Assembly Machine Product Platform for Small Shaft and Sleeve Subassemblies

2013 ◽  
Vol 589-590 ◽  
pp. 712-716
Author(s):  
Zi Qiang Zhang ◽  
Zhi Feng Deng ◽  
Run Dian Li
Keyword(s):  
Main Parameter ◽  
Design System ◽  
Product Platform ◽  
Product Platforms ◽  
Parameterized Design ◽  
Design Cycle ◽  
Assembly Drawing ◽  
Similar Product ◽  
3D Assembly ◽  
Engineering Drawings

The auto assembly machine adaptable product platforms for small shaft and sleeve subassemblies are multi-stations parameterized product platform that use the number of stations as the main parameter. A parameterized design system for the product platforms is established, and the development process is introduced in detail in this paper. In using the system, only needs to input the main parameter, the design of the product platforms can be realized, 3D model drawings of parts, 3D assembly drawing and engineering drawings, which we need, can be generated quickly. Thus, the product design cycle is shortened, and the design efficiency is improved. With broad applications value, the way can be extended to the design of similar product platform.

A numerical study on the effects of design parameters on the acoustics noise of a high efficiency propeller

2018 ◽  
Vol 91 (1) ◽  
pp. 30-37 ◽  
Author(s):  
Yunpeng Ma ◽  
Na Guo
Keyword(s):  
Noise Reduction ◽  
High Efficiency ◽  
Numerical Study ◽  
Three Dimensional ◽  
Aerodynamic Noise ◽  
Design Parameters ◽  
Geometrical Parameters ◽  
Content Type ◽  
Simulation Based ◽  
S Model

PurposeA numerical study on the aerodynamic noise generation of a high efficiency propeller is carried out.Design/methodology/approachThree-dimensional numerical simulation based on Reynolds averaged N-S model is performed to obtain the aerodynamic performance of the propeller. Then, the result of the aerodynamic analysis is given as input of the acoustic calculation. The sound is calculated using the Farassat 1A which was derived from Ffowcs Williams–Hawkings equation and is compared with the measurements.FindingsMoreover, the fan is modified for noise reduction by changing its geometrical parameters such as span, chord length and torsion angle.Originality/valueThe variation trend of aerodynamic and acoustic are compared and discussed for different modification tasks. Some meaningful conclusions are drawn on the noise reduction of propeller.

Research of Missile Parameterized Design System with ProToolkit

2011 ◽  
Vol 215 ◽  
pp. 393-396
Author(s):  
H.Z. Zhao ◽  
F.L. Yin
Keyword(s):  
New Products ◽  
System Structure ◽  
Secondary Development ◽  
Design Parameters ◽  
Design System ◽  
Main Design ◽  
Parameterized Design ◽  
Development Tools ◽  
Constraint Relation

The system structure of missile parameterized design is put forward to solve the repeat problems in the process of designing and manufacturing missiles. It is illustrated that in Pro/E environment the combination of missile design parameters with constraint relation is adopted to develop missile parameterized system with VC++6.0 and Pro/Toolkit used as secondary development tools for the secondary development and through the dynamic linkage, and the missile parameterized design system is integrated with Pro/E tightly. The missiles designers can obtain series of projectiles or new types of projectiles by modifying main design parameters, which making it possible to meet with a certain standard tactically and technically and shorten the cycle of designing new products.

Design of a High Performance Axial Compressor for Utility Gas Turbine

1991 ◽  
Author(s):  
A. Sehra ◽  
J. Bettner ◽  
A. Cohn
Keyword(s):  
Gas Turbine ◽  
High Performance ◽  
High Efficiency ◽  
Guide Vane ◽  
Design Flow ◽  
Design Parameters ◽  
Design System ◽  
Inlet Guide Vane ◽  
Variable Geometry ◽  
Compressor Design

An aerodynamic design study to configure a high efficiency industrial-size gas turbine compressor is presented. This study was conducted using an advanced aircraft engine compressor design system. Starting with an initial configuration based on conventional design practice, compressor design parameters were progressively optimized. To further improve the efficiency potential of this design, several advanced design concepts (such as stator ends bends and velocity controlled airfoils) were introduced. The projected polytropic efficiency of the final advanced concept compressor design having 19 axial stages was estimated at 92.8 percent, which is 2 to 3 percent higher than the current high efficiency aircraft turbine engine compressors. The influence of variable geometry on the flow and efficiency (at design speed) was also investigated. Operation at 77 percent design flow with inlet guide vanes and front five variable stators is predicted to increase the compressor efficiency by 6 points as compared to conventional designs having only the inlet guide vane as variable geometry.

Development of 3-D Parameterized Design System for Involute Gear Parts

2004 ◽  
Vol 471-472 ◽  
pp. 230-233
Author(s):  
Hang Gao ◽  
K. Zhao ◽  
Y. Lu
Keyword(s):  
Three Dimensional ◽  
Design System ◽  
Engineering Drawing ◽  
Improve Design ◽  
Gear Design ◽  
Parameterized Design ◽  
System A ◽  
Involute Gear ◽  
Geometric Entity ◽  
The Mathematical Model

Taking the three-dimensional CAD software Solidworks as developing platform and with the help of its powerful OLE technical support offered, the mathematical model of involute curved surface of bevel gear is established and the 3-D parameterized design and analyzing system for involute gear parts is developed in the paper. By inputting necessary variables on the interface of the gear design system an accurate 3-D parameterized geometric entity of involute gear can be automatically created. In the design system a kind of method called template technique is developed to realize the conversion of a gear part from 3-D geometric entity to corresponding 2-D standard engineering drawing and the marking of necessary design technical requests and parameters on the engineering drawing automatically, which offsets the lack that current three-dimensional CAD software can not automatically create standard two-dimensional CAD engineering drawing. Also the gear strength checkout program module is developed which is helpful to greatly improve design efficiency of involute gear parts.

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