Acoustic characteristics of the flow over different shapes of nozzle chevrons
Journal Title: INCAS BULLETIN - Year 2013, Vol 5, Issue 3
Abstract
The objective of this paper is to present a comparison between different types of chevrons and their influence on the acoustic power level radiated by the flow over them. The comparison was performed using a two-dimensional simulation of the flow over four different shapes of chevrons resulting propagation of the acoustic waves for each shape. Acoustic characteristics were revealed studying the main flow parameters (pressure, velocity, kinetic energy) in order to be able to discover the most efficient shape of chevron regarding the acoustic power level emitted.
Authors and Affiliations
Daniel CRUNTEANU, Petre-Claudiu COJAN
Spintronic devices based on graphene nanoribbons with transition metal impurities. Towards space applications
Very recent publications draw the attention to a possible revolution that nanotechnology can cause in aviation. The effervescence in the peak field of nanomaterials is remarkable, as evidenced by the number of Nobel priz...
ION STROESCU (1888-1961) A MAN and A LIFE – for a passion!
On the design of squeeze film dampers operating within the limits of the Reynolds theory
Squeeze film dampers (SFD) are used to control the shaft dynamics in rotating machinery; SFD are essentially thin oil films installed around the ball bearing housing (or even ball bearings outer races) to lower the stiff...
Calculus of axial force in a mechanism using Lagrange equations
Lagrange equations are used to study the motion of a system under the action of known external forces. Besides, based on these equations we can determine the internal force in an arbitrary element of the mechanism acting...
Numerical Calculation of Wind Tip Vortex Formation for Different Wingtip devices
In this study numerical calculations are conducted to understand implementation of different wingtip device for wingtip vortexes formation. Numerical methods are performed over NACA 0012 winglet at the varying Reynolds n...