Effect of Wing Sweep Angle on the Vortex Interaction of a Tail-Wing Configuration

Bahman Jahromi; M.R. Soltani; M. Masdari

Volume 9, Issue 1 , March 2012

Abstract
  The goal of this investigation is to study the effect of wing sweep angle on the horizontal wing-body- tail configurations in subsonic flow. For this purpose, a series of wind tunnel tests were conducted on a model having a moveable horizontal tail and a wing planform with different sweep angles. Tests ...  Read More

An Innovation in Film Cooling of the Gas Turbine Blades Applying an Upstream Jet

M.R. Salimi; M. Taeibi Rahni; Mahdi Ramezanizadeh

Volume 9, Issue 1 , March 2012

Abstract
  A new design concept is introduced to control the near-wall integration between the hot-gas boundary layer and the cooling jets in order to enhance the adiabatic film cooling effectiveness of the gas turbine blades. In this new approach, another film cooling port, having a very low blowing ratio, which ...  Read More

A Comprehensive Approach to Develop a Continuous Fuzzy Guidance Law for Maneuvering Targets

Labid Hassan; M.B. Malaek

Volume 9, Issue 1 , March 2012

Abstract
  Based on the idea of Continuous Fuzzy Guidance Law (CFGL), a andldquo;three-phase fuzzy guidanceandrdquo; (TFG) law is proposed for the class of surface to air homing missiles. The current approach enables the guidance law to track a maneuvering target from the beginning of the launch phase up to the ...  Read More

Helicopter Rotor Airloads Prediction Using CFD and Flight Test Measurement in Hover Flight

Davoud Hassanzadeh

Volume 9, Issue 1 , March 2012

Abstract
  An implicit unsteady upwind solver including a mesh motion approach was applied to simulate a helicopter including body, main rotor and tail rotor in hover flight. The discretization was based on a second order finite volume approach with fluxes given by the Roeand#39;s scheme. Discretization of Geometric ...  Read More

Practical Evaluation of EKF1 and UKF2 Filters for Terrain Aided Navigation

A. Moghtadaei Rad

Volume 9, Issue 1 , March 2012

Abstract
  This article would study batch and recursive methods that used in terrain navigation systems. Terrain navigation has a lot ofdisadvantages and so researchers have been studied on different method of aided navigation for many years. Therefore, more types of aided navigation systems were introduced with ...  Read More

Performance Modeling and Examination of Losses in the Axial -Flow Compressor and Comparisonwith Experimental Results

M. Eftari

Volume 9, Issue 1 , March 2012

Abstract
  The performance prediction of axial flow compressors at different speeds and under various pressure ratio conditions are still being developed because of costly empirical experiments. One-dimensional modeling is a simple, fast and accurate method for performance prediction in any type of compressor with ...  Read More

Crack Analysis, Using a New Coupled FE-EFG Method

S. Mohamadnejad

Volume 9, Issue 1 , March 2012

Abstract
  To solve crack problems, some coupled methods have been developed in recent years. Most of these methods have some shortcomings such as the need for a transition region. The finite element and enriched element free Galerkin methods are widely used for this class of problems. In order to take the advantages ...  Read More