Aerospace Science and Technology
Multi-scale modeling of thermal conductivity of carbon nanotube epoxy nanocomposites- CNT

ali Vahedi; Mohammad Homayoun Sadr; Saied Shakhesi

Volume 13, Issue 2 , October 2020, Pages 1-6

https://doi.org/10.22034/jast.2021.128047

Abstract
  Epoxy is among the most important polymers, which is extensively employed in various technologies and applications. Nevertheless, epoxy polymers present low thermal conductivities and thus the enhancement of their thermal conductivity is an important research topic. Carbon nanotubes (CNTs) owing to their ...  Read More

Aerospace Science and Technology
Numerical and Experimental Analysis of Ballistic Behaviour of Ceramic-Reinforced Al Matrix Composite Plates

Ali Ansari; Jafar Eskandari Jam; Ali Alizadeh; Mohsen Heydari Beni; Majid Eskandari Shahraki

Volume 13, Issue 2 , October 2020, Pages 7-26

https://doi.org/10.22034/jast.2021.126370

Abstract
  This study was designed to investigate the ballistic behavior of ceramic-reinforced aluminum composite plates numerically and experimentally and to present an optimal sample design. The parameters studied were ceramic reinforcement percentage and type of matrix alloy. This study used the matrix alloys ...  Read More

Aerospace Science and Technology
Restricted Three-Body Problem Considering Perturbations of Oblate Primaries

Ehsan Abbasali; Amir reza Kosari; Majid Bakhteiari

Volume 13, Issue 2 , October 2020, Pages 27-35

https://doi.org/10.22034/jast.2021.128013

Abstract
  In this paper, the effect of perturbations of oblate primaries in the Circular Restricted Three-Body Problem is studied, and the equations of satellite orbital motion in the Circular Restricted Three-Body Problem are developed by employing Lagrangian mechanics. Since the equations have no closed-form ...  Read More

Aerospace Science and Technology
Conceptual Design of Aeroderivative Industrial Gas Turbines

Rahman Amiri; Ali Madadi; Abolghasem Mesgarpour Tousi

Volume 13, Issue 2 , October 2020, Pages 36-46

https://doi.org/10.22034/jast.2021.128014

Abstract
  Designing and manufacturing turbine engines have many complexities and challenges that need time and cost. Therefore, reputable companies producing gas turbines have always sought to shorten the design and construction processes, one of which is to use the core of aerial gas turbines in industrial gas ...  Read More

Aerospace Science and Technology
Investigating the Effects of Noise and Parameter Changing on Modeling of Jet Transport Aircraft

Sina Jahandari; Ahmad Kalhor; Babak Nadjar Araabi

Volume 13, Issue 2 , October 2020, Pages 47-52

https://doi.org/10.22034/jast.2021.128049

Abstract
  This paper presents a novel approach to modeling of jet transport aircraft. Initially, basic mathematical models of jet transport are derived. Afterwards by focusing on the bank angle system of the jet transport, considering the aileron as the input, adverse methods of identification are utilized to ...  Read More

Aerospace Science and Technology
Two-Phase CFD Modeling of Three-Dimensional Supercavitating Flows

Ali Cheraghi; Reza Ebrahimi

Volume 13, Issue 2 , October 2020, Pages 53-60

https://doi.org/10.22034/jast.2021.127995

Abstract
   One of the most effective ways of high-speed motion in water is the motion in the supercavitation regime. This way provides the possibility to avoid considerable viscose resistance of boundary layer and consequently reach to very small drag coefficient which can be several times smaller than, that ...  Read More

Aerospace Science and Technology
Design of Deterministic Self-Tuning Regulators for the Pitch Angle of an Aircraft

Sina Jahandari; Ahmad Kalhor; Babak nadjar Araabi

Volume 13, Issue 2 , October 2020, Pages 61-65

https://doi.org/10.22034/jast.2021.128031

Abstract
  This paper addresses the adaptive control problem of an aircraft and focuses on the task that the pitch angle of the aircraft is required to follow the desired path. Considering the elevator deflection angle as the input and the pitch angle as the output, a mathematical model of the aircraft is derived ...  Read More

Aerospace Science and Technology
Analysis of Torsional Hysteresis Behavior of Shaft

Gholamreza Rashed

Volume 13, Issue 2 , October 2020, Pages 67-72

https://doi.org/10.22034/jast.2021.127994

Abstract
   In this paper, using the Abaqus finite element software, the torsional hysteresis of X52, X60, X65 steels under loadings with different torsion values, has been numerically investigated and they are compared to each other. The shear stress, effective stress, residual stress and elastic and plastic ...  Read More

Aerospace Science and Technology
The Strategy of using porous material in liquid fuel space propulsion injectors

alireza moradi; fathollah ommi; Zoheir Saboohi

Volume 13, Issue 2 , October 2020, Pages 73-84

https://doi.org/10.22034/jast.2021.126720

Abstract
  In the course of all-round advancement of engineering science, space research can be considered as the drivers of this forward movement. In the field of space propulsion, this trend can be seen as a backward trend, not in the sense of regression, but in the sense of optimizing the original designs used ...  Read More

Aerospace Science and Technology
A Simulation Algorithm for Staged Combustion Cycle Liquid Propellant Rocket Engines

Mahyar Naderi; Liang Guozhu; Hassan Karimi; Sara Pourdaraei

Volume 13, Issue 2 , October 2020, Pages 85-91

https://doi.org/10.22034/jast.2021.128003

Abstract
   In order to reduce cost and time along with enhancing the safety issues, numerical computer modelling and simulations are widely used for analyzing complex systems such as launch vehicle or spacecraft propulsion system. The objective of this research is to obtain an algorithm for simulation of ...  Read More

Aerospace Science and Technology
Experimental study of the Spray Pattern of a Non-Newtonian Gelled Fluid using Two Impinging Jets

Azadeh Kebriaee; Ali Nouri -Borujerdi; Ali Darvan

Volume 13, Issue 2 , October 2020, Pages 93-102

https://doi.org/10.22034/jast.2021.127993

Abstract
  The weaknesses of liquid propellants have led to special attention to gelled propellants in the last two decades as a way to overcome the weaknesses of these propellants. Previous studies have shown that the addition of gel-forming agents to liquid propellants converts these propellants, mainly Newtonian ...  Read More

Aerospace Science and Technology
Investigation of cooperative and non-cooperative conflict Resolution between aircraft using Game Theory

Amir reza Kosari; Seyedmostafa Sabatian; Pouya Aghamohammadkhan gorjy

Volume 13, Issue 2 , October 2020, Pages 95-103

https://doi.org/10.22034/jast.2021.127948

Abstract
  In this paper, a new methodology to develop an optimum flying law using model predictive control algorithm for a third order non-minimum phase system is presented. The guidance law of the optimum line of sight strategy may be extracted for an ideal non-minimum phase control model of first, second and ...  Read More