Even-echo rephasing and constant velocity flow

1987 ◽  
Vol 4 (5) ◽  
pp. 422-430 ◽  
Author(s):  
J. Katz ◽  
R. M. Peshock ◽  
C. R. Malloy ◽  
S. Schaefer ◽  
R. W. Parkey
Keyword(s):  
Constant Velocity ◽  
Velocity Flow

ON THE PROLONG ATTACHMENT OF LEADING EDGE VORTEX ON A FLAPPING WING

2009 ◽  
Vol 23 (03) ◽  
pp. 357-360 ◽  
Author(s):  
T. T. LIM ◽  
C. J. TEO ◽  
K. B. LUA ◽  
K. S. YEO
Keyword(s):  
Constant Velocity ◽  
Leading Edge ◽  
Flapping Wing ◽  
Constant Acceleration ◽  
Leading Edge Vortex ◽  
Velocity Flow ◽  
Edge Vortex ◽  
Per Se ◽  
Spanwise Flow ◽  
Negligible Influence

In this paper, we take a fundamental approach to investigate the effect of spanwise flow on the prolonged attachment of leading edge vortex (LEV) on a flapping wing. By imposing a constant acceleration-constant velocity flow on elliptic wings of various sweep angles and angles of attack, our experimental and numerical results show that while spanwise flow per se has negligible influence on the prolong attachment of the LEV, vortex stretching can significantly delay detachment of the LEV, even for a small spanwise flow.

Record Wear Studies by Scanning Electron Microscopy

1968 ◽  
Vol 26 ◽  
pp. 364-365
Author(s):  
M.D. Coutts ◽  
E.R. Levin ◽  
J.G. Woodward
Keyword(s):  
Electron Microscopy ◽  
Constant Velocity ◽  
Peak Velocity ◽  
Great Depth ◽  
Depth Of Focus ◽  
Sweep Frequency ◽  
Transmission Electron ◽  
Test Record ◽  
Lateral Mode ◽  
Scanning Electron

While record grooves have been studied by transmission electron microscopy with replica techniques, and by optical microscopy, the former are cumbersome and restricted and the latter limited by lack of depth of focus and resolution at higher magnification. With its great depth of focus and ease in specimen manipulation, the scanning electron microscope is admirably suited for record wear studies.A special RCA sweep frequency test record was used with both lateral and vertical modulation bands. The signal is a repetitive, constant-velocity sweep from 2 to 20 kHz having a duration and repetitive rate of approximately 0.1 sec. and a peak velocity of 5.5 cm/s.A series of different pickups and numbers of plays were used on vinyl records. One centimeter discs were then cut out, mounted and coated with 200 Å of gold to prevent charging during examination. Wear studies were made by taking micrographs of record grooves having 1, 10 and 50 plays with each stylus and comparing with typical “no-play” grooves. Fig. 1 shows unplayed grooves in a vinyl pressing with sweep-frequency modulation in the lateral mode.

1696: Velocity-Flow Plots Using Doppler Ultrasonogrpahy: Urodinamic Evaluation on Prostatic Enlargement

2004 ◽  
Vol 171 (4S) ◽  
pp. 448-448
Author(s):  
Hideo Ozawa ◽  
Hiroyuki Nose ◽  
Katsutoshi Uematsu ◽  
Teruhiko Yokoyama ◽  
Hiromi Kumon
Keyword(s):  
Velocity Flow ◽  
Prostatic Enlargement

ATOMIZATION CHARACTERISTICS OF LIQUID JETS INJECTED INTO A HIGH-VELOCITY FLOW FIELD

1994 ◽  
Vol 4 (4) ◽  
pp. 451-471 ◽  
Author(s):  
Nobuyuki Yatsuyanagi ◽  
Hiroshi Sakamoto ◽  
Kazuo Sato
Keyword(s):  
Flow Field ◽  
High Velocity ◽  
Liquid Jets ◽  
High Velocity Flow ◽  
Velocity Flow ◽  
Atomization Characteristics

SPECIFIC FEATURES OF DECELERATION OF A HIGH-VELOCITY FLOW IN CONVERGENT FIXED-GEOMETRY INLETS

2017 ◽  
Vol 48 (4) ◽  
pp. 341-355
Author(s):  
Vyacheslav Afanasievich Vinogradov ◽  
Natalya Valeryevna Guryleva ◽  
Mikhail Anatolyevich Ivan'kin ◽  
Vladimir Alekseevich Stepanov
Keyword(s):  
High Velocity ◽  
High Velocity Flow ◽  
Velocity Flow
Sign in / Sign up

Export Citation Format

Share Document