Experimental Study on the Deflagration Characteristics of the Liquid Propellant Spray Electrical Ignition and the Simplified Model Calculation

2010 ◽  
Author(s):  
Yu Yonggang ◽  
Zhao Na ◽  
Li Ming ◽  
Zhou Yanhuang
Keyword(s):  
Experimental Study ◽  
Model Calculation ◽  
Simplified Model ◽  
Liquid Propellant

scholarly journals Experimental study of the bed morphology downstream of a sluice gate

2018 ◽  
Vol 40 ◽  
pp. 03034
Author(s):  
Luís Carvalho ◽  
Elsa Carvalho ◽  
Rui Aleixo ◽  
Maria Manuela C. L. Lima
Keyword(s):  
Experimental Study ◽  
Data Acquisition ◽  
Imaging Techniques ◽  
Longitudinal Profile ◽  
Simplified Model ◽  
Sluice Gate ◽  
Moving Bed ◽  
Glass Spheres ◽  
Bed Morphology ◽  
Data Acquisition And Processing

This work describes an experimental study based on a simplified model of a vertical sluice gate installed in a channel with a moving bed of glass spheres with 2 mm diameter. The originated scour cavity and downstream dune were studied. The influence of the apron length and the downstream tailwater depth were also analysed. Imaging techniques provided the tools to this investigation. The data acquisition and processing consisted in acquiring images of the flow and automatically process them to identify the water-sediments interface and the longitudinal profile of sediments’ bed at different instants.

Experimental study and nuclear model calculation for 65Zn production

2017 ◽  
Vol 314 (3) ◽  
pp. 1759-1766 ◽  
Author(s):  
Malihe Rostampour ◽  
Mohammadreza Aboudzadeh ◽  
Mahdi Sadeghi ◽  
Saeid Hamidi ◽  
Behroz Alirezapour ◽  
...  
Keyword(s):  
Experimental Study ◽  
Model Calculation ◽  
Nuclear Model ◽  
Nuclear Model Calculation

Experimental Study of Artificial Features Attenuation in Rolling/Sliding Concentrated Contacts

2011 ◽  
Author(s):  
Petr Sperka ◽  
Ivan Krupka ◽  
Martin Hartl
Keyword(s):  
Thin Film ◽  
Experimental Study ◽  
Surface Roughness ◽  
High Pressure ◽  
Digital Camera ◽  
Simplified Model ◽  
Fourier Decomposition ◽  
Practical Design ◽  
Harmonic Components ◽  
Pass Through

A surface roughness attenuation approach based on the Fourier decomposition of surface roughness into harmonic components may allow predictions of the behavior of real rough surfaces within concentrated contacts. Recently the simplified model for rolling/sliding conditions was suggested. A high pressure ball on disk tribometer was complemented by hi-speed digital camera with the aim to observe a progress of roughness feature pass through the contact. The experiments with artificial features were carried out under rolling/sliding conditions, evaluated by thin film colorimetric interferometry and compared with theory. Detail understanding of real roughness behavior inside contact under rolling/sliding conditions can have extensive impact on practical design of machine components.

scholarly journals Datapath Optimization Using Layout Information: An Empirical Study

VLSI Design ◽  
1997 ◽  
Vol 5 (2) ◽  
pp. 195-209
Author(s):  
Allen C.-H. Wu
Keyword(s):  
Experimental Study ◽  
Empirical Study ◽  
Quality Measures ◽  
High Level Synthesis ◽  
Simplified Model ◽  
Area Model ◽  
Design Tradeoffs ◽  
Traditional Area ◽  
High Level

Most datapath synthesis approaches use a simple area model to evaluate design area quality. However, using such a simplified model could mislead synthesis tasks into generating inferior designs. This paper presents an extensive experimental study to validate the correlation between the tradition area model, our proposed area model, and the actual layouts. The results show that traditional area quality measures are not good indicators for optimization in datapath synthesis. Moreover, this paper also shows that to provide accurate indications for design tradeoffs in high-level synthesis, the fidelity of the estimates is more important than the accuracy.

An Experimental Study of Influence of Slits in Throat Position on Suppression of Cavitation Instabilities in Liquid Propellant Rocket Inducer

2019 ◽  
Author(s):  
Moena Kanamaru ◽  
Yoshito Kamikura ◽  
Satoshi Kawasaki ◽  
Takashi Shimura ◽  
Iga Yuka
Keyword(s):  
Experimental Study ◽  
Flow Field ◽  
Pressure Fluctuation ◽  
High Speed ◽  
Cavity Length ◽  
High Speed Camera ◽  
Liquid Propellant ◽  
Suppression Effect ◽  
Suction Performance ◽  
Propellant Rocket

Abstract Experiments of an inducer with symmetric slits were conducted. The purpose of the study is to explore the suppression effect on cavitation instabilities by slits. The slits are located in a throat position in each blade and it means symmetric slits. The experiments are done through measuring pressure fluctuation in the flow field and shaft displacement and visualization using high speed camera. In this study, the head performance, the suction performance, the cavity length and the occurrence range and the strength of the cavitation instabilities are compared with the results of inducer without slit. As a result, the slit in throat position does not give bad effect on head performance, improves suction performance, and has a relation to suppression of oscillation of cavitation instabilities because of the suppression effect of cavity length, although the occurrence range of super-synchronous rotating cavitation unfortunately increases because the cavity develops slowly.

scholarly journals GW46 High Voltage Isolation Switch Solid-Heat Coupling Simulation Analysis and Experimental Study

2020 ◽  
Vol 179 ◽  
pp. 01004
Author(s):  
Yuyang Song ◽  
Benxue Liu ◽  
Qinghui Wang ◽  
Peng Yuan
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Contact Pressure ◽  
High Voltage ◽  
Mechanical Characteristics ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Simplified Model ◽  
Clamping Force ◽  
Simulation Results

Taking the high⁃voltage disconnector of the GW46 type as research object, this research first use Solidworks to build its three-dimensional simplified model, then use ABAQUS to simulate the mechanical characteristics of the disconnector over a wide temperature range, analyzing the influence of the clamping force between the dynamic and static contacts on temperature, the contact pressure between the dynamic and static contacts of the high⁃voltage disconnector of the GW46 type increases with the ambient temperature, and the contact pressure becomes smaller. Compared simulation results with experimental data, the error is less than 5%. Analysis shows that using the ABAQUS to simulation analysis of temperature rise of the high⁃voltage disconnector of the GW46 type, it can be determined that the contact pressure between the dynamic and static contacts changes with temperature. It avoids the complexity of the traditional theoretical calculation of query parameters and tedious calculations, and provides strong reference evidence for improving the reliability of the high⁃voltage disconnector of the GW46 type.

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