The Multidisciplinary Design Optimization of a Reentry Vehicle Using Parallel Genetic Algorithms

Ali Moosavi; Masoud Mirzaei; Jafar Dr. Roshanian

Volume 7, Issue 1 , March 2010, Pages 1-8

  The purpose of this paper is to examine the multidisciplinary design optimization (MDO) of a reentry vehicle. In this paper, optimization of a RV based on, minimization of heat flux integral and minimization of axial force coefficient integral and maximization of static margin integral along reentry ...  Read More

Numerical Simulation of Fluid Flow Past a Square Cylinder Using a Lattice Boltzmann Method

S. Rowghani; Masoud Mirzaei; Reza Kamali

Volume 7, Issue 1 , March 2010, Pages 9-17

  The method of lattice boltzmann equation(LBE) is a kinetic-based approach for fluid flow computations. In the last decade, minimal kinetic models, and primarily the LBE, have met with significant success in the simulation of complex hydrodynamic phenomena, ranging from slow flows in grossly irregular ...  Read More

Tomographic Reconstruction of the Ionospheric Electron Density in term of Wavelets

Yazdan Amerian; ????? ????? ???????; B. Voosoghi; Ali Ghaffari

Volume 7, Issue 1 , March 2010, Pages 19-29

  Ionospheric tomography is a method to investigate the ionospheric electron density in two or three dimensions. In this study, the function-based tomographic technique has been used for regional reconstruction of a 3D tomographic model of the ionospheric electron density using the GPS measurements of ...  Read More

Critical Drag Investigation for an Axisymmetric Projectile with Choked Base Bleed at High-Subsonic and Transonic Regime Using SST K-? Model

Mahdi Saniei Nejad; R. Jamshidi

Volume 7, Issue 1 , March 2010, Pages 31-40

  In the following paper, the effects of a choked jet exhausted from the base of a non-lifting body on its total and base drags at sub-sonic and transonic regimes has been numerically investigated. Having surveyed the results of some turbulence models and after comparing with experimental results, an appropriate ...  Read More

Influence of System Parameters on Main Rotor Response

farid Shahmiri

Volume 7, Issue 1 , March 2010, Pages 41-49

  The main purpose of this paper is concerned with the sensitivity analysis of main rotor dynamic response pertaining to variation of some relevant system parameters effectively supports the preliminary design of both articulated and hingeless helicopter rotor configurations. The methodology is laid out ...  Read More

Effects of Pitching Motion on Shock Behavior in a Body-Wrap Around Fin Configuration

hamid fazeli; M.R. Soltani; alireza davari

Volume 7, Issue 1 , March 2010, Pages 51-57

  Unsteady dynamic behavior of TTCP model with different wrap around fin sets were investigated in a trisonic wind tunne. The aerodynamic coefficient force measurement in this wind tunnel shows good agreement in comparison with that of the NASA Langley Research Center in static case. The model was sinusoidally ...  Read More

Development of a Design Procedure for Aeronautical Structures Based on Reliability

F. Javidrad; F. Dabirian

Volume 7, Issue 1 , March 2010, Pages 59-67

  In this paper, an approach to aeronautical structural design based on reliability analysis is presented. In this way, the concept of level of safety is discussed and methods of its calculation using statistical data are described. Based on the concept of level of safety, a design procedure is proposed. ...  Read More