 | Slow Unsteady Flow of a Viscous Incompressible Fluid Between Two Wavy Walls
Author : Gaur, Y.N.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 1-12
Subject : 532.542 Fluid Dynamics;532 Fluid Mechanics
Keywords : Radiation Pressure Number ;Curved Shock
Abstract : The jump conditions across a three dimensional curved shock in radiation gas dynamics have been derived. The successive approximations have been used for different cases depending upon the value of radiation pressure number. The results are obtained in a form very convenient to treat the further problems in the subject. |
| | Shocks in Radiation Gas Dynamics
Author : Dhyani, Praveen
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 13-20
Subject : 533.6 Aerodynamics
Keywords : Curved Shock;Radiation Pressure Number
Abstract : The jump conditions across a three dimensional curved shock in radiation gas dynamics have been derived. The successive approximations have been used for different cases depending upon the value of radiation pressure number. The results are obtained in a form very convenient to treat the further problems in the subject. |
| | Intrinsic Properties of steady Diabatic Complex Lamellar Gas Flows
Author : Madhusudan ;Purushotham, G.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 21-26
Subject : 533.6 Aerodynamics
Keywords : Confocal Hyperbolae ;Beltrami Surfaces
Abstract : Considering the Beltrami surfaces of revolution obtained by revolving a system of confocal hyperbolae in the meridian plane, various kinetic and kinematic properties of steady diabatic complex lamellar gas flows have been studied. |
| | Impulsive Deboost for Maximum and Minimum Atmospheric Entry Angles
Author : Nagpal, O.P. ;Srivastava, T.N.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 27-30
Subject : 629.76 Rockets and Missiles
Keywords : Elliptic Orbits ;Rocket Vehicles
Abstract : Deboost of rocket vehicles initially moving in elliptic orbits for maximum and minimum atmospheric entry is analysed. It is shown that in general with specified retrofire velocity impulse and entry altitude, maximum entry angle is obtained when impulse is applied tangentially at the apogee whereas entry angle occurs when retrofire impulse is applied tangentially at the perigee. Existence conditions for only maximum or minimum or both neither maximum nor minimum entry have also been investigated. |
| | Expansion Formulae for the Kampe De Feriet Function Involving Bessel Function
Author : Wadhwa, A.D.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 31-38
Subject : 51 Mathematics
Keywords : Expansion Formulae
Abstract : In this paper some integrals involving a Kampe de Feriet; function have been evaluated. These have been used to establish some expansion formulae for the Kampe de Feriet function involving Bessel function. |
| | Some Contour Integrals Involving G Function of two Variables
Author : Gulati, H.C.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 39-42
Subject : 51 Mathematics
Keywords : Meijer's G Function
Abstract : The object of this is to evaluate contour integrals for G-function of two variables. Some results for Meijer's G-function have been obtained as particular cases. |
| | Fourier Series for Fox's H Function
Author : Taxak, R.L.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 43-48
Subject : 51 Mathematics
Keywords : Hypergeometric Functions ;Mac Robert's E Function;Meijer G Function
Abstract : Two integrals involving Fox's H-function have been evaluated and used to establish two Fourier series for the H-function. On specialising the parameters, the H-function can be reduced to Meijer G-function, Mac Robert's E-function, generalised hypergeometric functions and many other higher transcedental functions1. The results established are of a general character. |
| | Pressure Ratio in H/L Gun During Burning
Author : Ray, Asim
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 49-56
Subject : 623.4 Armaments and Ballistics
Keywords : H/L Gun ;Pressure Ratio
Abstract : In the present paper conditions have been obtained so that the pressure ratio in an H/L gun may remain less than critical during burning. Furthermore, conditions have been obtained to the effect that the pressure- ratio may be constant at a value less than or equal to critical during burning. |
| | Elastic Waves Due to Optical Potential
Author : Srivastava, S.B.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 57-60
Subject : 535 Optics
Keywords : Radiation ;Photoelectric Current;Absorption
Abstract : The phenomenon of optical potential producing elastic waves has been studied. The possibility for absorption is considered and the possibility of the conversion of elastic waves into photoelectric current or other forms of radiation is discussed. |
| | Piezometric Efficiency in an Orthodox Gun
Author : Bhattacharyya, R.N.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 61-74
Subject : 623.4 Armaments and Ballistics
Keywords : Muzzle Velocity;Pressure Driving
Abstract : It has been shown that the muzzle velocity and the piezometric efficiency have greater values in case of a suitable moderated charge than in case of a single charge. The suitable moderated charge should consist of two components such that the pressure driving the shot remains absolutely constant throughout the period when the second component burns, the constant pressure being equal to the pressure at the burnt of the first component. |
| | Prevention of Fungal Growth on Rubber Earpads of Telecommunication Equipments
Author : Tandan, R.N. ;Dayal, H.M.;Uniyal, B.P.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 61-74
Subject : 620.1 Material Science and Technology
Keywords : Rubber Earpads ;Zinc Oxide
Abstract : This paper recommends an addition of 100% zinc oxide to the rubber composition during its manufacture to effectively prevent fungal growth on the earpads without producing any adverse on its materials/performance or the user. |
| | Dustfall at Jodhpur Part IV
Author : Dave, U.K. ;Bhati, O.P.
Source : Defence Science Journal ; Vol:21(1) ; 1971 ; pp 79-85
Subject : 551.58 Climatology;551.5 Meteorology
Keywords : Atmospheric Dustfall Collections
Abstract : Atmospheric dustfall collections were determined during the year 1996 and 1967 in a newly designed dustfall collector and in large aluminium pans. The water solubles and insolubles were determined. |
