The Effect of Acceleration and Exit Velocity on Hypersonic Projectiles Launched by a Ground-based Railgun

2019 ◽  
Author(s):  
Hirotaka Kasahara ◽  
Akiko Matsuo
Keyword(s):  
Exit Velocity ◽  
Hypersonic Projectiles

Accurate Simulation of the Four Modes of Post-Die Extrudate Shape Distortion

2021 ◽  
Vol 36 (1) ◽  
pp. 69-78
Author(s):  
M. Gupta
Keyword(s):  
Layer Structure ◽  
Die Design ◽  
Velocity Variation ◽  
Shape Distortion ◽  
Exit Velocity ◽  
Extrusion Die ◽  
Combined Flow ◽  
Extruded Product ◽  
Simulation Results ◽  
Extrudate Distortion

Abstract A combined flow, thermal and structural analysis is employed to simulate post-die extrudate distortion in different profile dies. All four factors which can cause extrudate distortion, namely, nonuniform exit velocity distribution, extrudate shrinkage, extrudate draw down, and deformed shape of the calibrator or sizer profile, are simulated. To analyze the effect of exit velocity variation on extrudate distortion, the parameterized geometry of a simple profile die is optimized using an extrusion die optimization software. The simulation results presented for a bi-layer profile die successfully demonstrate how gradually changing profile shape in successive calibrators/sizers can be used to simplify the die design for extrusion of complex profiles. The predicted extrudate shape and layer structure for the bi-layer die are found to accurately match with those in the extruded product.

scholarly journals Exit velocity: is there truth in the commonly-held belief that grades for undergraduate students tend to improve from Year 2 to Year 3? A case study

2015 ◽  
Vol 6 (10) ◽  
Author(s):  
Mark Betteney
Keyword(s):  
Undergraduate Students ◽  
Exit Velocity ◽  
Degree Programme

This case study makes analysis of final-year Progression and Award Board data of a professional undergraduate degree programme taken from three annual cohorts (2010-11 to 2012-13). The analysis shows that for each cohort there was a degree of exit velocity for those students achieving a lower second class degree or better, with the more able students achieving most progress in grade improvement from Year 2 to Year 3. However, for those students who achieved only a third class degree, there was consistent grade regression from Year 2.

Recovery and effective utilization of waste heat from the exhaust of internal combustion engines for cooling applications using ANSYS

2021 ◽  
pp. 095440622110568
Author(s):  
Ghulam Abbas Gohar ◽  
Muhammad Zia Ullah Khan ◽  
Hassan Raza ◽  
Arslan Ahmad ◽  
Yasir Raza ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Heat Recovery ◽  
Waste Heat ◽  
Internal Combustion ◽  
Heat Energy ◽  
Exit Velocity ◽  
Inlet Velocity ◽  
Exhaust Gases ◽  
Recovery Unit ◽  
Libr Solution

The exhaust gases from an internal combustion (IC) engine carry away about 75% of the heat energy which means only 25% of heat energy is operated for power production. A recovery unit at the exhaust outlet port can ensure heat exchange between different temperature fluids through conjugate heat transfer phenomena. This study represents heat recovery from exhaust gases that are emitted from IC engines which can be utilized in various applications such as vapor absorption refrigeration systems. In the present work, a new type of perforated fin heat exchanger for waste heat recovery of exhaust gases is designed using SolidWorks, and the flow field design of the heat recovery system is optimized using ANSYS software. Various parameters (velocity, pressure, temperature, and heat conduction) of hot and cold fluid have been analyzed. Inlet velocity of cold fluids including refrigerant (LiBr solution), water, and graphene oxide (GO) nanofluid have been adopted at 0.03 m/s, 0.165 m/s, and 0.3 m/s, respectively. Inlet velocity of hot fluid is taken as 2 m/s, 4 m/s, and 6 m/s, respectively, to develop a test matrix. The results showed that maximum temperature reduction by the exhaust is achieved at 104.8°C using graphene oxide nanofluids with an inlet velocity of 0.3 m/s and exit velocity of 2 m/s in the heat recovery unit. Similarly, temperature reduction by exhaust gases is acquired at 102 °C using water and 96.34 °C by using a refrigerant (LiBr solution) with the same exit velocity (2 m/ s). Furthermore, maximum effectiveness of 0.489 is also obtained for GO nanofluid when compared with water and the refrigerant. On the other hand, the refrigerant has the maximum log mean temperature difference from all fluids with a value of 224.4 followed by water and GO.

Cost-Effective Salt Exit Velocity Retrieval Using Broadband CSEM

2020 ◽  
Author(s):  
A. Zerilli ◽  
P.T.L. Menezes ◽  
F. Miotti ◽  
A.R. Viana ◽  
E.J.C. Pinho ◽  
...  
Keyword(s):  
Cost Effective ◽  
Exit Velocity

scholarly journals Structure of Steady-State Oblique Detonation Wave Generated around Hypersonic Projectiles.

1999 ◽  
Vol 47 (551) ◽  
pp. 457-463 ◽  
Author(s):  
Jiro KASAHARA ◽  
Takuma ENDO ◽  
Kouji NISHIDE ◽  
Daisuke YAHATA ◽  
Toshi FUJIWARA
Keyword(s):  
Steady State ◽  
Detonation Wave ◽  
Oblique Detonation Wave ◽  
Hypersonic Projectiles

070 Evaluation of the Effect of Hot Iron Branding on Pen Score, Chute Score, Exit Velocity and Flight Distance in Young Senepol Cattle

2016 ◽  
Vol 95 (suppl_1) ◽  
pp. 35-35
Author(s):  
R. W. Godfrey ◽  
S. R. Joseph ◽  
J. A. Martinez ◽  
H. C. Nelthropp ◽  
S. A. Lakos ◽  
...  
Keyword(s):  
Flight Distance ◽  
Exit Velocity
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