Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Analysis of the high temperature effect in conical nozzle
Submission Author:
Bruno Coelho Lima , SP
Co-Authors:
João Felipe De Araujo Martos, Paulo Toro, Israel Rêgo, sergio nicolás pachón laitón, Bruno Coelho Lima
Presenter: Bruno Coelho Lima
doi://10.26678/ABCM.COBEM2017.COB17-2253
Abstract
In this work will be presented analytical analysis, simulation of computational fluid dynamics (CFD) and experimental tests. For the analytical analysis, routines were created in Python, the ANSYS Fluent solver for the CFD and the experiments were performed in the Shock Tunnel T3 - IEAv. The objective of this work is to study the influence of the high temperature effects on the nominal Mach number of a conical nozzle. For this work, the T3 shock tunnel was set with a conical nozzle of Mach 8 nominal number, with expansion of 15 ° and output diameter of 600 mm. The shock tunnel was operated in low and high enthalpy modes, this enthalpy difference was obtained by changing only the working gas of the Driver. In the condition of low enthalpy, we will not have effects of high temperature, however, in high enthalpy we will have effects of vibrational and beginning of dissociation of some molecules. These effects are sufficient to alter the thermodynamic properties of the fluid. Several CFD simulations were performed in the Fluent beginning with the inviscid case, testing several models of turbulence (as well as their variations). Also, the various models for corrections of the thermodynamic properties present in the software were tested. In the experiments, a Rake with equally spaced pressure transducers was used and positioned just after the nozzle exit, to discover the Mach number along the nozzle.
Keywords
conical nozzle, shock tunnel, high temperature effects, CFD, Computational Fluid Dynamics
