scholarly journals The estimation of applicability concerning the methods for calculation of asimple wing with wingtips inductive resistance during the flight near the earth surface

2020 ◽  
pp. 58-69
Author(s):  
Andrey N. Luchkov ◽  
Evgeny V. Zhuravlev ◽  
Egor Y. Cheban
Keyword(s):  
Drag Coefficient ◽  
Earth Surface ◽  
Drag Coefficients ◽  
End Plate ◽  
Induced Drag ◽  
The Earth ◽  
Wing Profile

One of the problems in the hovercrafts design is to dtermine the aerodynamic charactreistics of the wing near the earth surface. In this article, 4 methods for calculating the induced drag coefficient Cxi of a simple airfoil with an end plate at different relative heights were considered. Four methods of induced drag coefficient determination were considered for different relative flight’s heights. Calculations were performed according to the Phillips, Wieselsberge, Panchenkov-Surzhik, Mantle methods for the TsAGI-876 wing profile. The calculated values of induced drag coefficients were compared with the experimental wind tunnel’s data at the Central Aerohydrodynamic Institute.

Basis for the technique of the external control of the optical equipment for the remote sensing of the Earth surface

1997 ◽  
Vol 3 (3-4) ◽  
pp. 50-53
Author(s):  
O.D. Fedorovskyi ◽  
◽  
V.I. Kononov ◽  
K.Yu. Sukhanov ◽  
◽  
...  
Keyword(s):  
Remote Sensing ◽  
External Control ◽  
Earth Surface ◽  
The Earth

ESTIMATION OF THE EARTH SURFACE TEMPERATURE BY HIMAWARI-8/AHI

2016 ◽  
Vol 72 (2) ◽  
pp. II_1-II_6 ◽  
Author(s):  
Yuuki UCHIDA ◽  
Tomohito ASAKA ◽  
Takashi NONAKA ◽  
Keishi IWASHITA ◽  
Toshiro SUGIMURA
Keyword(s):  
Surface Temperature ◽  
Earth Surface ◽  
The Earth

Technical photography of surface motion

1962 ◽  
Vol 52 (5) ◽  
pp. 1007-1016
Author(s):  
B. Carder ◽  
J. Hefferman ◽  
D. Barnes
Keyword(s):  
New Mexico ◽  
Long Range ◽  
Short Range ◽  
Surface Displacement ◽  
Earth Surface ◽  
Peak Displacement ◽  
Surface Motion ◽  
Target Weight ◽  
The Earth ◽  
Analysis Of Results

abstract Photographic measurements of the earth-surface displacement were made on the gnome event, an underground nuclear detonation near Carlsbad, New Mexico, November 1961. One long range and three short range photo stations were used to provide complementary coverage. Motionless inertia weights were measured against graduated targets rigidly anchored to the surface. The experiment is described in detail including target/weight arrangement, camera specifications, and photo station locations in relation to Surface Zero. Analysis of results from 6 films from close-in stations and one film from the long range station are reported. The peak displacement measured was slightly greater than six feet at a location 106 feet from surface zero.

Pile Capacity in Homogeneous Unsaturated Sand Layer

2011 ◽  
Vol 110-116 ◽  
pp. 13-17
Author(s):  
Anuchit Uchaipichat ◽  
Ekachai Man Koksung
Keyword(s):  
Pile Foundation ◽  
Factor Of Safety ◽  
Matric Suction ◽  
Earth Surface ◽  
Sand Layer ◽  
Pile Capacity ◽  
Natural Soils ◽  
Unsaturated Sand ◽  
The Earth ◽  
Dry Conditions

Generally, pile foundation is typically chosen to support heavy structures. However, the developments of expressions to determine the pile capacity is usually based on fully saturated and completely dry conditions. In fact, almost 40 percent of natural soils on the earth surface are in an unsaturated state. Thus, in this paper, an expression for pile capacity in homogeneous unsaturated sand layer is developed. The simulations using developed expression are performed and discussed. Typical results show that the pile capacity and the factor of safety are affected by matric suction. However, the influence of matric suction may be ignored for a long pile.

Sign in / Sign up

Export Citation Format

Share Document