The mach number at the exit of the convergingdiverging nozzle depends upon the. In those studies, friction was not considered in calculating nozzle efficiency. The function of a rocket nozzle is to channelise and accelerate the combustion products produced by the burning propellant, inside a rocket motor, in such as way so as to maximize the velocity of the exhaust at the exit, to supersonic velocity. There are various types of rocket nozzles which are used depending upon the mission of the rocket. This nozzle configuration is called a convergent divergent, or cd, nozzle. In a cd nozzle, the hot exhaust leaves the combustion chamber and converges down to. Convergent divergent nozzle is the most commonly used nozzle since in using it the propellant can be heated in combustion chamber. However, a diverging section alone would not guarantee a supersonic flow. Volume 4 flow analysis in a convergentdivergent nozzle. In the present paper, flow through thetrinozzle and convergent divergent nozzle study is carried out by.
Modeling and simulation of convergent divergent nozzle using computational fluid dynamics. Cfd analysis of convergent divergent supersonic nozzle ms. Abstract flow in a conv ergent divergent nozzle is. Pdf flow in a convergent divergent nozzle is studied for pressure ratios npr of 111 and exittothroat area ratios of 1. Govinda rao 3 1assistant professor, department of mechanical engineering, gmrit, rajam, srikakulam, ap 2, 3 associate professor,department of mechanical engineering, gmrit, rajam srikakulam, ap. To empirically embed friction in the analysis, the energy conversion efficiency of rectangular convergingdiverging nozzles used for the ejector in this study was calculated. A rocket nozzle is a mechanical device which is designed to control the rate of flow, speed, direction and pressure of stream that exhaust through it. The nozzle converts the chemical energy of the propellant into kinetic energy with no moving parts.
Ramjets and rockets typically use a fixed convergent section followed by a fixed divergent section for the design of the nozzle. This is because it drives generators in producing electricity with the use of turbine rotors with curved axes. These results were further plotted comparing them with. This report contains the results of a study of uniform twozone perfect gas expansions in convergentdivergent nozzles. A nozzle is a relatively simple device, just a specially shaped tube through which hot gases flow. Convergent and divergent nozzle essay example graduateway.
Pdf simulation of convergent divergent rocket nozzle. Convergentdivergent supersonic nozzles are significantly used for. Lakshman flow analysis in a convergent divergent nozzle using cfd international journal of research in mechanical engineering volume 1, issue 2, octoberdecember. A convergent divergent nozzle is generally used in steam turbines.
This paper aims to study the behavior of flow in convergent divergent nozzle by analyzing various parameters like pressure, temperature and velocity using computational fluid dynamics softwarec. Values of the index n and the critical pressure ratio r, for different fluids are given in the table below. Design and fluid flow analysis of convergentdivergent nozzle. Creation of twodimensional geometry of the nozzle and meshing is done on workbench of ansys 14. Convergent divergent nozzle flow velocity and area equation and calculator throat velocity equation. A convergingdiverging nozzle condi nozzle, or cdnozzle, is the only one to get supersonic flows with m1 when chocked. Flow in converging and then convergingdiverging nozzle.
Divergent nozzle using computational fluid dynamics published at. Nozzle geometry, expansion ratios, flow and boundary conditions have been drawn on the basis of the literature survey. Modeling and simulation of convergentdivergent nozzle. Convergent divergent nozzle flow velocity and area. A convergent divergent or laval nozzle is a device that, under different conditions of fluid flow, is capable of generating the full range of mach numbers from. This nozzle configuration is called a convergentdivergent, or cd, nozzle. Kishore kumar 1 pg scholar, department ofmech,nalanda institution of engineering and technology kantepudisattenapalli, guntur,a. Pdf modeling and simulation of convergentdivergent. Determination of efficiency of converging diverging. Cfd analysis of convergent divergent supersonic nozzle.
467 677 1426 848 835 330 180 854 1213 348 489 122 243 410 1137 808 1437 623 208 1269 423 222 687 985 499 963 723 1118 8 1052 287 1329 1156 1054 1035 805