scholarly journals Low speed water-entry of cylindrical projectile

2012 ◽  
Vol 61 (13) ◽  
pp. 134701
Author(s):  
He Chun-Tao ◽  
Wang Cong ◽  
He Qian-Kun ◽  
Qiu Yang
Keyword(s):  
Water Entry ◽  
Low Speed

Study on the characteristics of the water-entry sound of low-speed metal sphere

2019 ◽  
Vol 146 (4) ◽  
pp. 2890-2890
Author(s):  
Yihan Yang ◽  
Qi Li ◽  
Dajing Shang ◽  
Rui Tang
Keyword(s):  
Water Entry ◽  
Low Speed ◽  
Metal Sphere

Experimental Study of Low Speed Vertical Water Entry of Projectiles

2017 ◽  
Author(s):  
RUI-QI WANG ◽  
ZHEN-GUI HUANG ◽  
ZE-QING GUO ◽  
ZHI-HUA CHEN ◽  
JIAN-GUO GAO
Keyword(s):  
Experimental Study ◽  
Water Entry ◽  
Low Speed

scholarly journals Simulation and experimental research on trans-media vehicle water-entry motion characteristics at low speed

PLoS ONE ◽  
2017 ◽  
Vol 12 (5) ◽  
pp. e0178461 ◽  
Author(s):  
Jian Yang ◽  
Yongli Li ◽  
Jinfu Feng ◽  
Junhua Hu ◽  
An Liu
Keyword(s):  
Experimental Research ◽  
Water Entry ◽  
Low Speed ◽  
Motion Characteristics

Analysis of Underwater Projectile Experiment Using One Stage Light Gas Gun and Numerical Simulation

2012 ◽  
Vol 226-228 ◽  
pp. 776-779
Author(s):  
Bai Qiu Wang ◽  
Cong Wang ◽  
Hai Long Huang ◽  
Yan Jiang Xing ◽  
Jia Zhong Zhang
Keyword(s):  
Initial Pressure ◽  
Water Entry ◽  
Residual Pressure ◽  
Thermodynamic Process ◽  
Velocity Difference ◽  
Low Speed ◽  
One Stage ◽  
Chamber Volume ◽  
Gas Gun ◽  
Underwater Projectile

One stage light gas gun is an important device for experiments of low-speed supercavitation projectiles. After a reasonable simplification to the gas gun, movements of the projectile in the barrel have been analyzed and the relationships between the initial pressure of the gas gun and the exit velocity of the projectile were obtained. For meeting the velocity difference between at the gun exit and water-entry, a speed impairment factor was employed. The results of the adiabatic analysis of the simplified gun show that the best ratio between gun chamber volume and the barrel length is related to the gas thermodynamic process and the gas residual pressure has relation to the gas thermodynamic process. The low-speed supercavitation projectile experiments have been carried out. The movements of the projectile in the gas gun and the supercavitation shape and projectile speed after water-entry have been numerically simulated.

New ultrastructural findings about Borrelia burgdorferi by cryofixation, negative staining, thin sectioning and scanning techniques

1990 ◽  
Vol 48 (3) ◽  
pp. 582-583
Author(s):  
S. F. Hayes ◽  
M. D. Corwin ◽  
T. G. Schwan ◽  
D. W. Dorward ◽  
W. Burgdorfer
Keyword(s):  
Lyme Disease ◽  
Borrelia Burgdorferi ◽  
Structural Characterization ◽  
Negative Staining ◽  
Low Speed ◽  
Thin Sectioning ◽  
Ultrastructural Findings

Characterization of Borrelia burgdorferi strains by means of negative staining EM has become an integral part of many studies related to the biology of the Lyme disease organism. However, relying solely upon negative staining to compare new isolates with prototype B31 or other borreliae is often unsatisfactory. To obtain more satisfactory results, we have relied upon a correlative approach encompassing a variety EM techniques, i.e., scanning for topographical features and cryotomy, negative staining and thin sectioning to provide a more complete structural characterization of B. burgdorferi.For characterization, isolates of B. burgdorferi were cultured in BSK II media from which they were removed by low speed centrifugation. The sedimented borrelia were carefully resuspended in stabilizing buffer so as to preserve their features for scanning and negative staining. Alternatively, others were prepared for conventional thin sectioning and for cryotomy using modified procedures. For thin sectioning, the fixative described by Ito, et al.

Reopening of Chronic Coronary Occlusions by Low-Speed Rotational Angioplasty

1994 ◽  
Vol 12 (4) ◽  
pp. 623-629 ◽  
Author(s):  
Andreas Hartmann ◽  
Martin Kaltenbach
Keyword(s):  
Low Speed
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