Aerospace Science and Technology
Surrogate Based Simulation in Multidisciplinary Design Optimization of a Space Transportation System

Hassan Naseh; Mehran MirShams; Hamid Reza Fazeley

Volume 15, Issue 2 , October 2022, Pages 1-15

https://doi.org/10.22034/jast.2022.329569.1115

Abstract
  Recently, engineering systems are quite large and complicated. Conceptual design process of Space Transportation Systems (STSs) is a multidisciplinary task which must take into account interactions of various disciplines and analysis codes. Current approach for the conceptual design of STSs requires ...  Read More

Aerospace Science and Technology
Numerical study of flow visualization and thermal performance for pulsating heat pipes

Sam Mohamad Hassan Pouryoussefi; Sohrab Gholamhosein Pouryoussefi

Volume 15, Issue 2 , October 2022, Pages 17-24

https://doi.org/10.22034/jast.2022.346070.1119

Abstract
  Importance of study of pulsating heat pipes (PHPs) behavior and limitations in conducting experimental studies, the necessity of numerical simulations is getting critical in this area. In present work, numerical simulations are carried out for pulsating heat pipes. Thermal performance of closed loop ...  Read More

Aerospace Science and Technology
A Novel Concept for VTOL Platform Combining Variable Pitch Main Rotor and Quadrotor Configurations

Mohammad Hossein Khalesi

Volume 15, Issue 2 , October 2022, Pages 25-34

https://doi.org/10.22034/jast.2022.353879.1122

Abstract
  Unmanned Aerial Vehicles (UAVs) have numerous applications in military, commercial and hobby fields. Among these vehicles, drones with vertical take-off and landing (VTOL) capability have attracted more attention due to their specific capabilities such as better maneuverability and hover flight. In recent ...  Read More

Aerospace Science and Technology
Thermodynamic Analysis of a Three-Spool Mixed-Flow Turbofan: An Approach to Improve Burner Performance

Sarallah Abbasi; MohammadAmin Daraei

Volume 15, Issue 2 , October 2022, Pages 35-46

https://doi.org/10.22034/jast.2022.340613.1117

Abstract
  In this research, the thermodynamic analysis of a three-spool mixed-flow turbofan engine has been studied by examining parameters such as flight altitude, flight Mach number, fan pressure ratio, high and Intermediate-pressure compressor pressure ratios, bypass ratio and burner exit temperature. First, ...  Read More

Aerospace Science and Technology
Droplet Breakup Analysis inside Porous Media at Different Porosities, Using LBM

Mohammad Reza Salimi; Mohammad Taeibi Rahni; Abolfazl Amiri Hezaveh

Volume 15, Issue 2 , October 2022

https://doi.org/10.22034/jast.2022.322220.1110

Abstract
  In present research, the interaction between single liquid droplet with particles inside a porous media is investigated numerically in two dimensions. The He’s model is used to simulate two phase flow and multiple relaxation time collision operator is implemented to increase numerical stability. ...  Read More

Aerospace Science and Technology
Three-Axis Satellite Attitude Control with Fractional-Order PID Controller in the presence of Uncertainty and Disturbance

Amir reza Kosari; Elahe Khatoonabadi; Vahid Bohlouri

Volume 15, Issue 2 , October 2022

https://doi.org/10.22034/jast.2022.321251.1109

Abstract
  In this paper, the control of a three-axis rigid satellite attitude control system with a fractional order proportional-integral-derivative (PID) controller is investigated in the presence of disturbance and parametric uncertainties. The reaction wheel actuator with the first-order dynamic model is used ...  Read More

Aerospace Science and Technology
Localization and aerodynamic improvement of an urban-scale vertical axis wind turbine according to the Sistan climate

seyed sam Saham; Saeed Karimian Aliabadi

Volume 15, Issue 2 , October 2022

https://doi.org/10.22034/jast.2022.315321.1106

Abstract
  The use of urban and rural scale wind turbines that in addition to generating power can play the role of old wind turbines in arid areas will be very attractive. In this research it has been tried to first evaluate the wind energy potential in Zahedan city and then to evaluate a sample of vertical axis ...  Read More

Aerospace Science and Technology
Numerical Investigation of Aerodynamic Performance of Planar/grid Stabilizer wings at Downstream Control Surface in Transonic Flow Regime

Mahdi Miralam; Amir Rahni

Volume 15, Issue 2 , October 2022

https://doi.org/10.22034/jast.2022.245863.1033

Abstract
  In multi-stage Missiles, stabilizer wings are responsible for stabilizing the Missile. The control fins located upstream of the stabilizer wings affect the flow by spinning, which influences stability as well as control. One method for resolving this problem is to design stabilizer wings with less affectability ...  Read More

Aerospace Science and Technology
Three Dimensional Robust Guidance Law for Reaching Maneuvering Targets Based on Finite-Time Sliding Mode Control

Seyyed S Moosapour; Amin Keyvan

Volume 15, Issue 2 , October 2022

https://doi.org/10.22034/jast.2022.295270.1081

Abstract
  This paper provides an academic insight into the design of a three-dimensional guidance law which can be utilized to reach the maneuvering targets in definite angles. Firstly, the theoretical phenomenon of a conventional dynamic inversion which can be implemented for reaching targets with constant velocity ...  Read More

Aerospace Science and Technology
Numerical simulation of combustion with the aim of obtaining temperature distribution, identifying and eliminating power reduction factors of a gas turbine engine

Hamed Arhami; Mohammad Mazidi Sharfabadi

Volume 15, Issue 2 , October 2022

https://doi.org/10.22034/jast.2022.302883.1097

Abstract
  In this research, combustion modeling inside the combustion chamber of a typical turboprop engine has been investigated. The complex geometry of this combustion liner was modeled according to the technical drawings and the turbulent flow and internal combustion were simulated numerically and three-dimensionally. ...  Read More

Aerospace Science and Technology
Buckling Behavior of Functionally Graded Nano Clay-Reinforced Composite Beams

Mahdi Karami Khorramabadi; Ali Reza Nezamabadi

Volume 15, Issue 2 , October 2022

https://doi.org/10.22034/jast.2022.341613.1118

Abstract
  In this paper, the buckling behavior of functionally graded simply supported nanocomposite beams reinforced by nano clay is studied. The specimens were prepared and the experimental tensile and buckling tests are carried out. The elastic modulus of epoxy/clay nanocomposite for functionally graded and ...  Read More

Aerospace Science and Technology
Reducing inertial navigation error using Tightly coupled integrated INS/GPS Structure

Amir Moghtadaei Rad

Volume 15, Issue 2 , October 2022

https://doi.org/10.22034/jast.2022.306926.1099

Abstract
  Inertial navigation amplifies the noise of the input sensors over time due to the presence of an integrator in the output path to determine the position and status of the object. This system has high bandwidth and good short-term accuracy. GPS navigation, on the other hand, has low bandwidth, low noise ...  Read More