Aerospace Science and Technology
Experimental Investigation of the Effects of Leading-Edge Serration on the Blades of Savonius Wind Turbine

Sahel Alasvand; Mostafa Kazemi; Mahmood Mani

Volume 17, Issue 1 , June 2024, Pages 1-8

https://doi.org/10.22034/jast.2023.398694.1150

Abstract
  The noise of wind turbines is mainly of aerodynamic origin and is caused by the impact of the flow on the turbine blade. Therefore, improving the behaviour of the flow around the turbine and reducing aeronoise can result in reducing its annoying noise. In the first step of this research, a suitable serration ...  Read More

Aerospace Science and Technology
Guidelines on Conceptual and Preliminary Design of Hypersonic Waveriders with Different Number of Inlet Ramps

Mohammadreza Varshavi; Sahar Noori

Volume 17, Issue 1 , June 2024, Pages 11-22

https://doi.org/10.22034/jast.2023.400869.1155

Abstract
  Air-breathing hypersonic flight is presumed by many of the savants in the field of aeronautical engineering as the last boundary of aerial vehicle design to be pushed back. An auspicious design configuration for the prospective hypersonic transport vehicles of the future is a “Waverider,” ...  Read More

Aerospace Science and Technology
Ionospheric electron density reconstruction over central Europe using neural networks: A comparative study

Seyyed Reza Ghaffari-Razin; Reza Davari-Majd; Behzad Voosoghi; Navid Hooshangi

Volume 17, Issue 1 , June 2024, Pages 23-33

https://doi.org/10.22034/jast.2023.187660.1020

Abstract
  Computerized Ionospheric Tomography (CIT) is a method to reconstruct ionospheric electron density image by computing Total Electron Content (TEC) values from the recorded GPS signals. Due to the poor spatial distribution of GPS stations, limitations of signal viewing angle and discontinuity of observations ...  Read More

Aerospace Science and Technology
Optimal Strategy for Multi-agent Mission Segregation: Search and Coverage Application

Benyamin Ebrahimi; Jafar Roshanian; Ali Asghar Bataleblu

Volume 17, Issue 1 , June 2024, Pages 34-46

https://doi.org/10.22034/jast.2023.403842.1156

Abstract
  Significant attention has been given to the field of multi-agent systems in recent years due to its potential to solve complex problems that cannot be addressed by a single agent. One such problem is the cooperative search and coverage application, which requires multiple agents to efficiently search ...  Read More

Aerospace Science and Technology
Design and Analysis of Supersonic Inlet for Ramjet Engines: Aerodynamic Considerations and Performance Optimization

Mohammad Hossein Moghimi EsfandAbadi; Adnan Mohammadi; Mohammad Hassan Djavareshkian

Volume 17, Issue 1 , June 2024, Pages 47-59

https://doi.org/10.22034/jast.2023.421137.1165

Abstract
  This research delves into the intricate realm of supersonic inlet design for ramjet engines, honing in on the critical aerodynamic considerations and optimization of performance factors. At Mach 2.5, the study meticulously scrutinizes pivotal design parameters, including the placement and number of inclined ...  Read More

Aerospace Science and Technology
Aerodynamic Coefficients Computation for Fixed Wing Aircrafts Using DATCOM Software with Emphasize on Rudderless Flying-Wing UAVs

Sevda Rezazadeh Movahhed; Mohammad Ali Hamed

Volume 17, Issue 1 , June 2024, Pages 60-71

https://doi.org/10.22034/jast.2023.398894.1152

Abstract
  The fixed-wing unmanned aerial vehicles (UAVs) have gained significant attention across diverse civilian and military applications in recent years, where precision control, advanced manoeuvrability, and elevated stealth capabilities are paramount. In order to design a robust control system to enable ...  Read More

Aerospace Science and Technology
Design and Comparison of MPC and LQR Control Methods for a Passenger Aircraft

Amirali Nikkhah; Moein Ebrahimi; Morteza Tayfi; Navid Mohammadi

Volume 17, Issue 1 , June 2024, Pages 72-80

https://doi.org/10.22034/jast.2023.397939.1153

Abstract
  The paper compares the performance of two altitude controllers, model predictive controller (MPC) and linear quadratic requlator (LQR), for aircraft in cruise flight and height change conditions. The design of the controllers is based on the linearized state space matrix of the aircraft’s longitudinal ...  Read More