Programmable Test Bench for Hemodynamic Studies

2009 ◽  
pp. 1460-1463 ◽  
Author(s):  
H. C. Pereira ◽  
J. M. Cardoso ◽  
V. G. Almeida ◽  
T. Pereira ◽  
E. Borges ◽  
...  
Keyword(s):  
Test Bench

Simulation of propellant component utilization in the test bench environment by the gas injection into the engine feed lines

2003 ◽  
Vol 9 (1s) ◽  
pp. 105-108
Author(s):  
Yu.A. Prokopenko ◽  
◽  
E.V. Strelchenko ◽  
Keyword(s):  
Test Bench ◽  
Gas Injection

Investigations of Road Wear Caused by Studded Tires

2014 ◽  
Vol 42 (1) ◽  
pp. 2-15
Author(s):  
Johannes Gültlinger ◽  
Frank Gauterin ◽  
Christian Brandau ◽  
Jan Schlittenhard ◽  
Burkhard Wies
Keyword(s):  
Traffic Safety ◽  
Test Bench ◽  
Operating Conditions ◽  
Test Method ◽  
Analytical Models ◽  
The Road ◽  
Driving Speed ◽  
Major Factors ◽  
Tire Friction ◽  
Variable Operating Conditions

ABSTRACT The use of studded tires has been a subject of controversy from the time they came into market. While studded tires contribute to traffic safety under severe winter conditions by increasing tire friction on icy roads, they also cause damage to the road surface when running on bare roads. Consequently, one of the main challenges in studded tire development is to reduce road wear while still ensuring a good grip on ice. Therefore, a research project was initiated to gain understanding about the mechanisms and influencing parameters involved in road wear by studded tires. A test method using the institute's internal drum test bench was developed. Furthermore, mechanisms causing road wear by studded tires were derived from basic analytical models. These mechanisms were used to identify the main parameters influencing road wear by studded tires. Using experimental results obtained with the test method developed, the expected influences were verified. Vehicle driving speed and stud mass were found to be major factors influencing road wear. This can be explained by the stud impact as a dominant mechanism. By means of the test method presented, quantified and comparable data for road wear caused by studded tires under controllable conditions can be obtained. The mechanisms allow predicting the influence of tire construction and variable operating conditions on road wear.

Analysis of the Impact of the Frequency Range of the Tensometer Bridge and Projectile Geometry on the Results of Measurements by the Split Hopkinson Pressure Bar Method

2013 ◽  
Vol 20 (4) ◽  
pp. 555-564 ◽  
Author(s):  
Wojciech Moćko
Keyword(s):  
Test Bench ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Deformation ◽  
Spectral Width ◽  
Hopkinson Pressure Bar ◽  
Computing Environment ◽  
Split Hopkinson ◽  
Pressure Bar ◽  
The Impact ◽  
Bench Model

Abstract The paper presents the results of the analysis of the striker shape impact on the shape of the mechanical elastic wave generated in the Hopkinson bar. The influence of the tensometer amplifier bandwidth on the stress-strain characteristics obtained in this method was analyzed too. For the purposes of analyzing under the computing environment ABAQUS / Explicit the test bench model was created, and then the analysis of the process of dynamic deformation of the specimen with specific mechanical parameters was carried out. Based on those tests, it was found that the geometry of the end of the striker has an effect on the form of the loading wave and the spectral width of the signal of that wave. Reduction of the striker end diameter reduces unwanted oscillations, however, adversely affects the time of strain rate stabilization. It was determined for the assumed test bench configuration that a tensometric measurement system with a bandwidth equal to 50 kHz is sufficient

Test bench for experimental study of the geometric stiffness in vibration of beams as support of rotating machines

2017 ◽  
Author(s):  
Alexandre de Macêdo Wahrhaftig ◽  
Reyolando Brasil ◽  
Gabriela Silva Correia Cordeiro
Keyword(s):  
Experimental Study ◽  
Test Bench ◽  
Rotating Machines ◽  
Geometric Stiffness

NUMERICAL INVESTIGATION OF THE FLOW INSIDE A PILOT SUPERSONIC COMBUSTOR TEST BENCH

2020 ◽  
Author(s):  
Taiana Cortes ◽  
Valéria Leite ◽  
Guilherme Ribeiro ◽  
Débora Cristina Menezes Silva
Keyword(s):  
Numerical Investigation ◽  
Test Bench

Certification principles for reproduction of multiphase test bench flow-rate

2018 ◽  
pp. 13-18
Author(s):  
V.N. Petrov ◽  
◽  
F.M. Galimov ◽  
O.K. Borisova ◽  
S.V. Petrov ◽  
...  
Keyword(s):  
Flow Rate ◽  
Test Bench

Research and implementation of OUT endpoint test bench for USB3.0 device controller IP core

2013 ◽  
Vol 26 (7) ◽  
pp. 646-651
Author(s):  
Congzhong Wu ◽  
Le Peng ◽  
Yajun Wang ◽  
Xizhen Yin
Keyword(s):  
Test Bench ◽  
Ip Core

A study of work and improve of water content in PEMFC with liquid cooling

2020 ◽  
Vol 6 (2) ◽  
pp. 8-21
Author(s):  
Konstantin V. Agapov ◽  
Dmitriy O. Dunikov ◽  
Kirill D. Kuzmin ◽  
Evgeniy V. Stoyanov
Keyword(s):  
Fuel Cell ◽  
Temperature Difference ◽  
Test Bench ◽  
Problem Area ◽  
Solid Polymer ◽  
Liquid Cooling ◽  
Current Voltage ◽  
Additional Resistance ◽  
Overall Performance ◽  
The Heat Balance

In this publication, in addition to focusing on the engineering component in creating our own test bench for trying various modes and the overall performance of solid polymer fuel cells with electric power of more than 2 kW, the features of the result of the operation of a liquid-cooled fuel cell in the field of heat transfer are displayed. It is known that its performance and service life depend on a properly tuned water and thermal balance of the fuel cell. The problem area is described in the insufficient moisture content of the supplied air to the fuel cell and the excess heat in the fuel cell. In this case, the negative consequence is that additional resistance to the rate of the electrochemical reaction is created, as a result of which the generated power decreases. A possible way to solve this problem is proposed: so, according to the heat balance equation, by increasing the temperature difference between the incoming and outgoing heat carrier, more heat energy can be removed. The temperature difference was achieved using a water-air radiator. The increased removal of thermal energy allowed the condensation of part of the moisture inside the fuel cell, maintaining the humidity and conductivity of the membrane, but not allowing flooding of the channels with liquid water, which otherwise could lead to a decrease in performance. During the tests, it was possible to increase the removed power by 321 w, which is 8.4% in excess of the maximum power. Based on the obtained experimental results, dependencies were constructed that are expressed by the current-voltage characteristic, power curve, the amount of heat removed by the water from the fuel cell, and a graph of the change in water temperature at the inlet and outlet of the fuel cell at various stages of operation.

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