One-Dimensional Simulation of Free-Piston Shock Tunnel/Expansion Tubes

1995 ◽  
pp. 457-462
Author(s):  
M. Mitsuda ◽  
T. Oda ◽  
T. Kurosaka ◽  
S. Wakuri ◽  
T. Arai
Keyword(s):  
Shock Tunnel ◽  
Free Piston ◽  
One Dimensional ◽  
Dimensional Simulation ◽  
Expansion Tubes

Quasi-one-dimensional modeling of a free-piston shock tunnel

AIAA Journal ◽  
1994 ◽  
Vol 32 (1) ◽  
pp. 137-145 ◽  
Author(s):  
P. A. Jacobs
Keyword(s):  
Shock Tunnel ◽  
Free Piston ◽  
One Dimensional ◽  
Dimensional Modeling

Free-flight measurement technique in the free-piston high-enthalpy shock tunnel

2014 ◽  
Vol 85 (4) ◽  
pp. 045112 ◽  
Author(s):  
H. Tanno ◽  
T. Komuro ◽  
K. Sato ◽  
K. Fujita ◽  
S. J. Laurence
Keyword(s):  
Measurement Technique ◽  
Shock Tunnel ◽  
Free Flight ◽  
Free Piston ◽  
High Enthalpy ◽  
Flight Measurement ◽  
High Enthalpy Shock Tunnel

Study on Performance Optimization of Car Diesel Engine with VNT Based on One-Dimensional Simulation and Experimental Verification

2012 ◽  
Vol 155-156 ◽  
pp. 12-17 ◽  
Author(s):  
Lian Xu Wang ◽  
Da Wei Qu ◽  
Chang Qing Song ◽  
Ye Tian
Keyword(s):  
Experimental Data ◽  
Diesel Engine ◽  
Performance Optimization ◽  
High Speed ◽  
Turbine Blades ◽  
Simulation Software ◽  
Engine Operation ◽  
One Dimensional ◽  
Distribution Phase ◽  
Dimensional Simulation

To research the performance optimization of high speed car diesel engine，firstly according to the characteristic of car diesel engine with Variable Nozzle Turbocharger (VNT)， one-dimensional cycle model of the engine was established by using simulation software BOOST and validated by experimental data in this paper. The turbine blades’ opening corresponding to different speed was determined. Therefore the problem that the VNT surges at low engine speed and the inlet air flow is insufficient at high speed was solved. Based on the above model, this paper improved the efficiency of the engine by optimizing the compression ratio and the distribution phase of camshaft and then used the experimental data to check the simulation results. Meanwhile the fuel consumption and the possibility of the engine operation roughness decreased.

Preliminary results with a free piston shock tunnel

AIAA Journal ◽  
1965 ◽  
Vol 3 (6) ◽  
pp. 1170-1171 ◽  
Author(s):  
R. J. STALKER
Keyword(s):  
Shock Tunnel ◽  
Free Piston ◽  
Preliminary Results

scholarly journals One-Dimensional Simulation of Clay Drying

2002 ◽  
Vol 23 (2) ◽  
pp. 135-147
Author(s):  
Siljan Siljan ◽  
Morten Chr Melaaen
Keyword(s):  
One Dimensional ◽  
Dimensional Simulation

scholarly journals Investigating two kinds of cellular alternans and corresponding TWA induced by impaired calcium cycling in myocardial ischemia

2021 ◽  
Vol 18 (6) ◽  
pp. 7648-7665
Author(s):  
Jiaqi Liu ◽  
◽  
Zhenyin Fu ◽  
Yinglan Gong ◽  
Ling Xia
Keyword(s):  
Myocardial Ischemia ◽  
Conduction Velocity ◽  
Ionic Channel ◽  
Calcium Cycling ◽  
One Dimensional ◽  
T Wave ◽  
Cell Simulation ◽  
T Wave Alternans ◽  
Dimensional Simulation ◽  
The Relationship

<abstract> <sec><title>Background</title><p>The utility of T wave alternans (TWA) in identifying arrhythmia risk has been demonstrated. During myocardial ischemia (MI), TWA could be induced by cellular alternans. However, the relationship between cellular alternans patterns and TWA patterns in MI has not been investigated thoroughly.</p> </sec> <sec><title>Methods</title><p>We set MI conditions to simulate alternans. Either prolonging Ca<sup>2+</sup> release or increasing spark-induced sparks (secondary sparks) can give rise to different patterns of APD alternans and TWA. In addition, different ischemic zones and reduced conduction velocity are also considered in one dimensional simulation.</p> </sec> <sec><title>Results</title><p>Delay of Ca<sup>2+</sup> release can produce discordant Ca<sup>2+</sup>-driven alternans in single cell simulation. Increasing secondary sparks leads to concordant alternans. Correspondingly, morphology and magnitude of TWA vary in two different cellular alternans. Epi ischemia results in alternans concentrating in the first half of T wave. Endo and transmural ischemia lead to fluctuations in the second half of T wave. In addition, slowing conduction velocity has no effect on TWA magnitude.</p> </sec> <sec><title>Conclusion</title><p>Specific ionic channel dysfunction and ischemic zones affect TWA patterns.</p> </sec> </abstract>

A study of free-piston driven double-diaphragm drivers for expansion tubes

1997 ◽  
Author(s):  
M. Kendall ◽  
R. Morgan ◽  
P. Petrie-Repar ◽  
M. Kendall ◽  
R. Morgan ◽  
...  
Keyword(s):  
Free Piston ◽  
Expansion Tubes

Design and Characterization of the Sandia Free-Piston Reflected Shock Tunnel

2022 ◽  
Author(s):  
Kyle P. Lynch ◽  
Thomas Grasser ◽  
Paul Farias ◽  
Kyle Daniel ◽  
Russell Spillers ◽  
...  
Keyword(s):  
Shock Tunnel ◽  
Free Piston ◽  
Reflected Shock
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