DISCUSSION ON EFFECTS OF FLOOD FLOW IN LOWLAND CITY AT ALLUVIAL PLAIN ON URBAN UTILITY GAS SYSTEM WITH REFERENCES TO INUNDATION PROCESSES AND DRAG FORCE DISTRIBUTIONS

2018 ◽  
Vol 74 (5) ◽  
pp. I_1489-I_1494
Author(s):  
Takashi TASHIRO ◽  
Kentaro YAGI ◽  
Yuji TODA
Keyword(s):  
Drag Force ◽  
Alluvial Plain ◽  
Gas System ◽  
Flood Flow

EXPERIMENT STUDY ON FLOOD-FLOW CHRATERISTICS AND DRAG FORCE EXTERTED ON CAR IN FLOODED UNDERGROUND PARKING

2019 ◽  
Vol 75 (1) ◽  
pp. 17-25
Author(s):  
Takaaki OKAMOTO ◽  
Yuma HONJO ◽  
Keiichi TODA ◽  
Taisuke ISHIGAKI
Keyword(s):  
Drag Force ◽  
Experiment Study ◽  
Flood Flow

Ion Drag Force on a Charged Macroparticle in Collisionless Plasma

2013 ◽  
Vol 58 (3) ◽  
pp. 228-236 ◽  
Author(s):  
I.L. Semenov ◽  
Keyword(s):  
Drag Force ◽  
Collisionless Plasma

Assessment of the Exploitation Rate and Sustainability of an Alluvial Plain in Southwestern Burkina Faso

2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Nestor Fiacre Compaor ◽  
Amagana Emmanuel Dara ◽  
Mahamadou Ko ◽  
Djamilatou Mody Dao ◽  
Hamma Fabien Yonli
Keyword(s):  
Burkina Faso ◽  
Alluvial Plain ◽  
Exploitation Rate

Experimental Study of Flow Control Over a Standard Road Vehicle Using Plasma Actuator

2020 ◽  
Vol 22 (4) ◽  
pp. 1047-1060
Author(s):  
S. Shadmani ◽  
S. M. Mousavi Nainiyan ◽  
R. Ghasemiasl ◽  
M. Mirzaei ◽  
S. G. Pouryoussefi
Keyword(s):  
Flow Control ◽  
Pressure Distribution ◽  
Drag Force ◽  
Separated Flow ◽  
Plasma Actuator ◽  
Road Vehicle ◽  
Slant Angle ◽  
Total Drag ◽  
Slant Surface ◽  
Ahmed Body

AbstractAhmed Body is a standard and simplified shape of a road vehicle that's rear part has an important role in flow structure and it's drag force. In this paper flow control around the Ahmed body with the rear slant angle of 25° studied by using the plasma actuator system situated in middle of the rear slant surface. Experiments conducted in a wind tunnel in two free stream velocities of U = 10m/s and U = 20m/s using steady and unsteady excitations. Pressure distribution and total drag force were measured and smoke flow visualization carried out in this study. The results showed that at U = 10m/s using plasma actuator suppress the separated flow over the rear slant slightly and be effective on pressure distribution. Also, total drag force reduces in steady and unsteady excitations for 3.65% and 2.44%, respectively. At U = 20m/s, using plasma actuator had no serious effect on the pressure distribution and total drag force.

OUTDOOR TESTS OF A TOWED BOAT MODEL WITH FUEL COMBUSTION IN A BOTTOM CAVITY

2020 ◽  
Author(s):  
S. M. FROLOV ◽  
◽  
S. V. Platonov ◽  
K. A. AVDEEV ◽  
V. S. AKSENOV ◽  
...  
Keyword(s):  
Drag Force ◽  
Direct Contact ◽  
Propulsion System ◽  
Hydrodynamic Drag ◽  
Atmospheric Air ◽  
System A ◽  
Bottom Cavity ◽  
Gas Cavity ◽  
System Power ◽  
Gas Supply

To reduce the hydrodynamic drag force to the movement of the boat, an artificial gas cavity is organized under its bottom. Such a cavity partially insulates the bottom from direct contact with water and provides “gas lubrication” by means of forced supply of atmospheric air or exhaust gases from the main propulsion system. A proper longitudinal and transverse shaping of the gas cavity can significantly (by 20%-30%) reduce the hydrodynamic drag of the boat at low (less than 3%) consumption of the propulsion system power for gas supply.

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