A CAD Method for Centrifugal Compressor Impellers

1984 ◽  
Vol 106 (2) ◽  
pp. 482-488 ◽  
Author(s):  
H. Krain
Keyword(s):  
Centrifugal Compressor ◽  
Calculation Method ◽  
Computer Aided Design ◽  
Design Method ◽  
Fluid Dynamic ◽  
Three Dimensional ◽  
Theoretical Data ◽  
Laser Measurements ◽  
Geometrical Concept ◽  
Aided Design

A computer-aided design method (CAD) has been developed for radially ending and backswept centrifugal compressor impellers. The geometrical concept introduced for generating the impeller geometry takes care of numerical, manufacturing, as well as aerodynamic aspects. The fluid dynamic calculation method applied is based on a quasi-three-dimensional approach coupled with a boundary layer calculation method. Detailed quantitative comparisons between theoretical data and laser measurements taken within a radially ending impeller revealed predominantly good agreement. Backswept impellers of different size and shape have been designed by the approach presented.

scholarly journals PARAMETRIC DESIGN OF DELTA ROBOT

2016 ◽  
Vol 4 ◽  
pp. 803-806 ◽  
Author(s):  
Mert Gürgen ◽  
Cenk Eryılmaz ◽  
Vasfi Emre Ömürlü
Keyword(s):  
Computer Aided Design ◽  
Parametric Design ◽  
Three Dimensional ◽  
Theoretical Data ◽  
Technical Solution ◽  
3D Cad ◽  
3D Data ◽  
Kinematic Behavior ◽  
Delta Robot ◽  
Aided Design

This article describes a sophisticated determination and presentation of a workspace volume for a delta robot, with consideration of its kinematic behavior. With the help of theoretical equations, optimization is performed with the aid of the stiffness and dexterity analysis. Theoretical substructure is coded in Matlab and three-dimensional (3D) data for delta robot are developed in computer-aided design (CAD) environment. In later stages of the project, both 3D and theoretical data are linked together and thus, with the changing design parameter of the robot itself, the Solidworks CAD output adapts and regenerates output with a new set of parameters. To achieve an optimum workspace volume with predefined parameters, a different set of robot parameters are iterated through design optimization in Matlab, and the delta robot design is finalized and illustrated in the 3D CAD environment, Solidworks. This study provides a technical solution to accomplish a generic delta robot with optimized workspace volume.

An Approximate Three-Dimensional Aerodynamic Design Method for Centrifugal Impeller Blades

1990 ◽  
Vol 112 (1) ◽  
pp. 44-49 ◽  
Author(s):  
Zhao Xiaolu ◽  
Qin Lisen
Keyword(s):  
Centrifugal Compressor ◽  
Design Method ◽  
Fluid Dynamic ◽  
Three Dimensional ◽  
Design Procedure ◽  
Taylor Series Expansion ◽  
Centrifugal Impeller ◽  
Aerodynamic Design ◽  
Impeller Blade ◽  
Blade Geometry

An aerodynamic design method, which is based on the Mean Stream Surface Method (MSSM), has been developed for designing centrifugal compressor impeller blades. As a component of a CAD system for centrifugal compressor, it is convenient to use the presented method for generating impeller blade geometry, taking care of manufacturing as well as aerodynamic aspects. The design procedure starts with an S2m indirect solution. Afterward from the specified S2m surface, by the use of Taylor series expansion, the blade geometry is generated by straight-line elements to meet the manufacturing requirements. Simultaneously, the fluid dynamic quantities across the blade passage can be determined directly. In terms of these results, the designer can revise the distribution of angular momentum along the shroud and hub, which are associated with blade loading, to get satisfactory velocities along the blade surfaces in order to avoid or delay flow separation.

Design of Longitudinal Beam Layout on a Curved Shell Based on the Production-Oriented Design Concept

1994 ◽  
Vol 10 (04) ◽  
pp. 217-222
Author(s):  
Kohji Honda ◽  
Noriyuki Tabushi
Keyword(s):  
Crude Oil ◽  
Computer Aided Design ◽  
Design Method ◽  
Three Dimensional ◽  
Design System ◽  
Two Dimensional ◽  
Skilled Workers ◽  
System A ◽  
Computer Aided ◽  
Aided Design

A VLCC (very large crude oil carrier) has approximately 1000 curved longitudinal beams, many of which have three-dimensional complicated curvatures. Due to the shortage of highly skilled workers and the need to keep costs down, production and structural designers have worked to reduce the number of such beams. In order to meet the requirements of production, the authors' company has attempted several design approaches for the longitudinal beam layout to reduce the number of beams that have complicated curvature. Recently, through the application of a computer-aided design system, which has been improved for shipbuilding based on the Calma's system, a new design method for the longitudinal beam layout has been successfully developed. A significant number of beams with a twisted configuration have been eliminated and replaced with beams of simpler, two-dimensional shapes. This paper shows the transition of these design approaches, and the application of the new design to building a VLCC.

scholarly journals A Unified Solution Method for the Flow Calculations Along S1 and S2 Stream Surfaces Used for the Computer-Aided Design of Centrifugal Compressor

1988 ◽  
Author(s):  
Wang Qinghuan ◽  
Yu Haoyu
Keyword(s):  
Centrifugal Compressor ◽  
Computer Aided Design ◽  
Solution Method ◽  
Three Dimensional ◽  
Curvilinear Coordinates ◽  
Direct Solution ◽  
Aerodynamic Design ◽  
Problem Method ◽  
Computer Aided ◽  
Aided Design

In order to facilitate the aerodynamic design for the computer-aided design (CAD) of centrifugal compressor, a unified direct problem method for the flow calculations along S1 and S2 stream surfaces has been presented in the present paper. A single stream function equation expressed by nonorthogonal curvilinear coordinates and the unified matrix direct solution for the governing equation have been used. This method greatly simplifed the quasi-three dimensional and full dimensional computing program, meanwhile it improved the computing accuracy and the convergence rate. Numerical examples have illustrated the advantages of the new technique for CAD of centrifugal compressors.

Support Engineering Computer-Aided Design Systems and BIM Template

2014 ◽  
Vol 971-973 ◽  
pp. 1906-1911
Author(s):  
Y. Peng ◽  
L. Zheng ◽  
B.S. Ruan
Keyword(s):  
Computer Aided Design ◽  
Architectural Design ◽  
Design Method ◽  
Three Dimensional ◽  
Building Design ◽  
Vital Role ◽  
Computer Aided ◽  
New Thinking ◽  
Support Engineering ◽  
Aided Design

In computer-aided design meteoric rise in the field of architectural design , computers have become an important tool for architects work. The use of computers has changed a lot of work methods. Updated key architectural design methods, using new thinking tools by updating to assist architectural design ideas that can help us find new ways to architectural creation. We know that there is a convenient three-dimensional computer modeling, easy to modify and intuitive physical display. The concept of the future whether to play a vital role in the concept of the method, and eventually will change and affect the building design and construction. By using computer-aided design and design examples to make computer-aided design method building construction design process , the use of further explanation.

Computer-aided design and optimization of centrifugal pumps

2005 ◽  
Vol 219 (3) ◽  
pp. 187-193 ◽  
Author(s):  
M Asuaje ◽  
F Bakir ◽  
S Kouidri ◽  
R Noguera ◽  
R Rey
Keyword(s):  
Performance Analysis ◽  
Computer Aided Design ◽  
Fluid Dynamic ◽  
Three Dimensional ◽  
Centrifugal Pumps ◽  
Design And Optimization ◽  
Design Software ◽  
And Performance ◽  
Aided Design ◽  
Physical Phenomena

Improvement in computer power and the development of numerical computational methods over the last few years have allowed the emergence of computational fluid dynamic (CFD) codes, making possible the numerical simulation of flow and energy transfer in turbomachines. To improve the efficiency of these tools, fast design software must be used. Within the framework of the optimization process of centrifugal pumps, HELIOX software was developed. It is a tool for design and performance analysis of centrifugal pumps. HELIOX allows quick design of new pumps and improvement of existing ones. HELIOX's performance analysis has been validated through many industrial cases: approximately 100 machines of different sizes and mechanical power. Heliox can be linked to quasi-and three-dimensional analysis tools; these tools enable a better understanding of physical phenomena so as to control the flow fields inside pumps.

Fabrication of 3D Temperature Sensor Using Magnetostrictive Inkjet Printhead

2020 ◽  
Vol 64 (5) ◽  
pp. 50405-1-50405-5
Author(s):  
Young-Woo Park ◽  
Myounggyu Noh
Keyword(s):  
Flexible Electronics ◽  
Inkjet Printing ◽  
Temperature Sensor ◽  
Computer Aided Design ◽  
Low Cost ◽  
Three Dimensional ◽  
Drop On Demand ◽  
Aided Design ◽  
Nanoparticle Ink ◽  
Inkjet Printhead

Abstract Recently, the three-dimensional (3D) printing technique has attracted much attention for creating objects of arbitrary shape and manufacturing. For the first time, in this work, we present the fabrication of an inkjet printed low-cost 3D temperature sensor on a 3D-shaped thermoplastic substrate suitable for packaging, flexible electronics, and other printed applications. The design, fabrication, and testing of a 3D printed temperature sensor are presented. The sensor pattern is designed using a computer-aided design program and fabricated by drop-on-demand inkjet printing using a magnetostrictive inkjet printhead at room temperature. The sensor pattern is printed using commercially available conductive silver nanoparticle ink. A moving speed of 90 mm/min is chosen to print the sensor pattern. The inkjet printed temperature sensor is demonstrated, and it is characterized by good electrical properties, exhibiting good sensitivity and linearity. The results indicate that 3D inkjet printing technology may have great potential for applications in sensor fabrication.

scholarly journals Automatized Evaluation of Students’ CAD Models

2021 ◽  
Vol 11 (4) ◽  
pp. 145
Author(s):  
Nenad Bojcetic ◽  
Filip Valjak ◽  
Dragan Zezelj ◽  
Tomislav Martinec
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Application ◽  
Test Cases ◽  
Cad Model ◽  
Computer Solution ◽  
3D Cad ◽  
Computer Aided ◽  
Cad Models ◽  
Aided Design

The article describes an attempt to address the automatized evaluation of student three-dimensional (3D) computer-aided design (CAD) models. The driving idea was conceptualized under the restraints of the COVID pandemic, driven by the problem of evaluating a large number of student 3D CAD models. The described computer solution can be implemented using any CAD computer application that supports customization. Test cases showed that the proposed solution was valid and could be used to evaluate many students’ 3D CAD models. The computer solution can also be used to help students to better understand how to create a 3D CAD model, thereby complying with the requirements of particular teachers.

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