Numerical simulations on increasing turbojet engines exhaust mixture ratio using fluidic chevrons
Journal Title: INCAS BULLETIN - Year 2017, Vol 9, Issue 2
Abstract
This paper refers to some aspects regarding the terms “chevron” and “fluidic chevron” and to the process of increasing the jet engines exhaust mixing rate towards achieving noise reduction. One of the noise reduction methods consists in covering the high velocity main flow with a secondary one, having a much lower velocity, similar to the turbofan engines. The fluidic chevrons try to accomplish these requirements, being used just in particular moments of the flight. This study will be based on numerical simulations carried using the commercial software ANSYS. The geometry used will the based on the micro jet engine JetCat P80, equipping the turbines laboratory from the Faculty of Aerospace Engineering. A research based on the measured geometric, gasodynamic and cinematic parameters will be carried varying the mass flow and keeping the immersion angle constant. As a result of these simulations we’ll observe the influence of the mentioned parameters on the jet’s flow field.
Authors and Affiliations
Adrian GRUZEA
Keywords
Related Articles
- EP ID EP293792
- DOI 10.13111/2066-8201.2017.9.2.7
- Views 97
- Downloads 0
Aeroderivative Gas Turbo engine in CHP Plant. Compatibility Problems
The paper presents the possibilities to develop Combined Cycle Units based on aeroderivative Gas Turbo engines and on existing Steam Turbines. The specific compatibility problems of these components and the thermodynamic...
EVAPRED - A CODE FOR FATIGUE ANALYSIS OPTIMIZATION
The fatigue can be, in fact, defined as: “failure under a repeated or otherwise varying load, which never reaches a level sufficient to cause failure in a single application”. Physical testing is clearly unrealistic for...
A magneto rheological hybrid damper for railway vehicles suspensions
High speed railway vehicles features a specific lateral oscillation resulting from the coupled lateral displacement and yaw of the wheelset which leads to a sinusoid movement of the wheelset along the track, transferred...
LOW FREQUENCY DAMPER
The low frequency damper is an autonomous equipment for damping vibrations with the 1-20Hz range. Its autonomy enables the equipment to be located in various mechanical systems, without requiring special hydraulic instal...
S.C. Advanced Training Aircraft IAR 99 (A) SOIM
The use of subsonic single control aircraft and especially of double–control ones, instead of supersonic combat aircraft in the military pilot training programs in the operational units, has be-come a necessity due to th...