Aerospace Science and Technology
The New Hybrid Meta-Model by Using DOE and RSM for Liquid Propellant Engine’s Feed System Optimization

Hamid reza Ali mohamadi; Hassan Naseh; Fathollah Ommi

Articles in Press, Accepted Manuscript, Available Online from 27 December 2023

https://doi.org/10.22034/jast.2023.367044.1135

Abstract
  The present paper strives for optimization of the Liquid-Propellant Engine (LPE)’s feed system. To this end, the new hybrid meta-model methodology by utilizing the Design of Experiment (DOE) method and the Response Surface Method (RSM) were developed and implemented as two effective means of designing, ...  Read More

Aerospace Science and Technology
Advancing Flexible Rope Motion Measurement in Aerospace: Vision-Based Innovations for Enhanced Accuracy and Efficiency through Edge Segmentation

Mohammad Hassan Pachenari

Articles in Press, Accepted Manuscript, Available Online from 13 February 2024

https://doi.org/10.22034/jast.2024.418390.1161

Abstract
  Flexible ropes have wide-ranging applications in aerospace engineering, yet accurately measuring their motion state without disrupting dynamic characteristics remains a challenge. This study introduces a visual measurement method aimed at precisely assessing flexible rope motion to support the development ...  Read More

Aerospace Science and Technology
Investigating the relative motion of two satellites corresponding to the orbital collocation strategy

Fatemeh Amozegary; Amir reza Kosari; Mahdi Fakoor

Volume 16, Issue 1 , June 2023, , Pages 101-114

https://doi.org/10.22034/jast.2023.376290.1142

Abstract
  The ever increasing demand for placing satellites in the geostationary orbit has caused the revision and change of the conventional mechanism of allocating orbital slots. Therefore, collocation approaches and station keeping of several satellites with a common position have been developed to improve ...  Read More

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
Optimal decision making in designing an Earth observation mission with considering the technical challenges of the platform and the impossibility of injection into the sun-synchronous orbit

Asad Saghari; Amirreza Kosari; Masoud Khoshsima

Volume 14, Issue 1 , June 2021, , Pages 73-83

https://doi.org/10.22034/jast.2021.308893.1100

Abstract
  This paper deals with the problem of optimal selection of orbital parameters for an Earth observation mission in the absence of the possibility of injection into sun-synchronous orbit by considering the requirements and limitations of the mission and the satellite platform. By modeling the existing relationships ...  Read More