Global and local stability and instability of the constant spatially developing gas flow
Journal Title: INCAS BULLETIN - Year 2015, Vol 7, Issue 4
Abstract
In this paper different types of stabilities (global, local) with respect to instantaneous perturbations and permanent source produced time harmonic perturbations are presented in case of a spatially developing gas flow. Some types of instabilities (global absolute, local convective) are also presented. For this purpose the Euler equations linearized at the constant gas flow are used. It is shown for instance, that the constant gas flow is global absolutely unstable with respect to some instantaneous and some permanent source produced time harmonic perturbations. The locally convective instability is also proven with respect to some instantaneous and permanent source produced time harmonic perturbations.
Authors and Affiliations
Agneta BALINT, Stefan BALINT
Keywords
Related Articles
- EP ID EP143527
- DOI 10.13111/2066-8201.2015.7.4.5
- Views 94
- Downloads 0
Mathematical and numerical modeling of inverse heat conduction problem
The present paper refers to the assessment of three numerical methods for solving the inverse heat conduction problem: the Alifanov’s iterative regularization method, the Tikhonov local regularization method and the Tikh...
DESIGN & ANALYSIS TOOLS AND TECHNIQUES FOR AEROSPACE STRUCTURES IN A 3D VISUAL ENVIRONMENT
The main objective of this project is to develop a set of tools and to integrate techniques in a software package which is build on structure analysis applications based on Romanian engineers experience in designing and...
Subsonic Jet Pump Comparative Analysis
The paper presents the numerical and experimental studies carried out to optimize, from an aerodynamic point of view, a subsonic jet pump used on aircraft. The optimization of the subsonic jet pump will be done from the...
Unsteady numerical estimation of the aerodynamic loads of the Krueger flap
The aim of this paper is to study the unsteady aerodynamic interaction between a Krueger flap and a three-element airfoil using the finite volume method to solve the Unsteady Reynolds-Averaged Navier-Stokes equations. Fo...
A Hydro-Dynamical Model for Gravity
A hydro-dynamical model for gravity by using an analogy with the attraction of spherical sources in incompressible fluids is proposed. Information regarding a photon-like particle called graviton is taken using an author...