Air Dynamics Characteristics Analysis of Air Splicer

2013 ◽  
Vol 561 ◽  
pp. 483-489 ◽  
Author(s):  
Jiang Zhong Wang ◽  
Guang Zhen Zhou ◽  
Li Li ◽  
De Gong Chang
Keyword(s):  
Textile Industry ◽  
High Speed ◽  
Optimization Design ◽  
Structural Characteristics ◽  
Air Flow ◽  
Flow Analysis ◽  
Key Technology ◽  
Theoretical Support ◽  
Characteristics Analysis ◽  
Theory Research

Air splicing technology is the key technology to realize high speed, high quality and automatic winding in modern textile industry. However the current research of splicing mechanism is still in qualitative analysis, theoretical and experimental exploration stage. By modern computational mechanics method, with the air flow analysis results in different structures and shapes of splicer chamber, the air flow patterns under high pressure are determined; and the optimized structural characteristics of the splicing chamber are obtained in this paper. The results provide theoretical support on the innovative splicer chamber design, promote the development of the new air splicing technology, create important practical value, and provide the feasible means and methods in the air splicer theory research and optimization design.

Modal Analysis of the Cylinder Mechanism Based on ANSYS Workbench

2013 ◽  
Vol 561 ◽  
pp. 496-500
Author(s):  
De Gong Chang ◽  
Hong Yun Dou ◽  
Fu Qin Yang ◽  
Rong Zong
Keyword(s):  
Modal Analysis ◽  
High Speed ◽  
Optimization Design ◽  
Critical Speed ◽  
Structural Characteristics ◽  
Safety Evaluation ◽  
Mode Shapes ◽  
Bearing Stiffness ◽  
Working Principle ◽  
Ansys Workbench

According to the working principle and structural characteristics of cylinder mechanism, the simplified model is built by the Pro/E software. Then we carry on the modal analysis for cylinder mechanism combined with ANSYS Workbench [1], and obtain the natural frequency and mode shapes of all steps. It provides the basis for optimization design and safety evaluation of cylinder mechanism. Finally, we study the influence of bearing stiffness on the critical speed, which provides the basis for the research of high-speed cylinder.

CFD Investigation of Damper Plate Effect on Air Flow in High Speed Rotation Hard Disk Drive by Using K-E with a Partial Model

2013 ◽  
Vol 392 ◽  
pp. 85-89 ◽  
Author(s):  
Jarupol Suriyawanakul ◽  
Kiatfa Tangchaichit
Keyword(s):  
High Speed ◽  
Air Flow ◽  
Computing Time ◽  
Flow Analysis ◽  
Flow Simulation ◽  
Disk Drive ◽  
Return Flow ◽  
Partial Model ◽  
High Speed Rotation ◽  
Boundary Model

In HDD air flow simulation, the well known LES turbulent model requires large computing times and resources, including CPU, RAM and storage intensive which is not appropriate when using various variables. The effect of an air damper is studied by the k-e model with a reduced boundary due to the lower number of equations, computing time and computer resources. Firstly the RMS velocities of a partial model are compared between LES and k-e and then the reduced boundary models are compared with the partial model. The RMS velocity errors of the partial model compared with LES and k-e are less than 6 %. The mean RMS velocity errors compared with the reduced boundary model and the partial model are 3.93% at ID and 2.12% at MD position while the OD position increased to 26.5% because there is no effect from a return flow from the flex bracket and voice coil zone. Computing time of the reduced boundary and k-e model is reduced by 68.4%. In primary HDD air flow analysis, the k-e method together with a reduced model can be used to predict the effect of an air damper.

Optimization Design of the Lawn Mowing Vehicle's Blade Based on Aerodynamics

2011 ◽  
Vol 199-200 ◽  
pp. 173-181
Author(s):  
Li Zu ◽  
Lei Zhang ◽  
Hua Kun Wang
Keyword(s):  
High Speed ◽  
Optimization Design ◽  
Air Flow ◽  
Optimized Design ◽  
Motion Model ◽  
Flow Conditions ◽  
Air Movement ◽  
Blade Tip ◽  
Cfd Method ◽  
Stable Flow

In this paper, air movement states within the cutter deck caused by high-speed rotating blades are studied, impacts on the mowing blade by the air movement are analyzed with the consideration of the cutter structure. It will provide important references for the blade optimal design. By Computational Fluid Dynamics (shortened as CFD) method, the high relative speed motion model between the blade and air flow is established, the flow field through the blade tip section are simulated, and the instantaneous movement of air flow around the blade can be known. By the analysis of the aerodynamic influence, the optimized design of the mowing blade can be achieved. The lawn mowing vehicle with the optimized blade can have a good and stable flow conditions when cutting the grass, the performance and the value of the vehicle thereby are enhanced.

scholarly journals Air Flow Analysis around High-speed Rotating Roller

2018 ◽  
Vol 64 (3) ◽  
pp. 63-69
Author(s):  
Keisuke MATSUDA ◽  
Gunki NUKUI ◽  
Jun SAWADA ◽  
Kiyoshi HATTA ◽  
Toshiyasu KINARI
Keyword(s):  
High Speed ◽  
Air Flow ◽  
Flow Analysis

A Program Designed for the High-Speed Gearbox Test-Bed Based on LabVIEW

2012 ◽  
Vol 157-158 ◽  
pp. 727-730
Author(s):  
Feng Tao Wang ◽  
Liang He ◽  
Dong Wu
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Program Design ◽  
Structural Characteristics ◽  
Test Bed ◽  
Key Technology ◽  
Application Program ◽  
Instrument Control

According to the test-bed requirements and structural characteristics of gearbox ,this system for high-speed gearbox is designed based on LabVIEW. Firstly, programming mode and structure of the application program is introduced, secondly, data acquisition, bus technology of instrument control is presented. At last, the key technology of the program design is also expounded.

Some Developments in Instrumentation for Air-Flow Analysis

1949 ◽  
Vol 161 (1) ◽  
pp. 213-226 ◽  
Author(s):  
K. W. Todd
Keyword(s):  
Wind Tunnel ◽  
High Speed ◽  
Air Flow ◽  
Flow Analysis ◽  
Physical Analysis ◽  
Flow Conditions ◽  
Compressor Cascade ◽  
Confined Spaces

Evolution of research into flow conditions in confined spaces, such as model ducts or blade cascades under high subsonic or transonic air velocities, has necessitated the development of specialized forms of instrumentation for both optical and physical analysis. In this paper some of these special instruments are described, and an example of their application to a compressor-cascade examination in a high-speed wind tunnel is included.

MULTIDIMENSIONAL SIMULATIONS AND TEST FIRES OF A HYDROGEN-FUELED RAMJET WITH AN ANNULAR DETONATIVE COMBUSTOR AT APPROACHING AIR FLOW OF MACH 2 AND 1.5

2020 ◽  
Author(s):  
V. S. IVANOV ◽  
◽  
V. S. AKSENOV ◽  
S. M. FROLOV ◽  
P. A. GUSEV ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
High Speed ◽  
Constant Pressure ◽  
Air Flow ◽  
Thermodynamic Cycle ◽  
Aerial Vehicles ◽  
Mach Numbers

Modern high-speed unmanned aerial vehicles are powered with small-size turbojets or ramjets. Existing ramjets operating on the thermodynamic cycle with de§agrative combustion of fuel at constant pressure are efficient at flight Mach numbers M ranging from about 2 to 6.

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