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
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
Experimental investigation of vortical flow induced by canard on a diamond wing equipped with LEX

Mohammad Reza Hashemi; Seyyed Majid Malek Jafarian; Mojtaba Dehghan Manshadi

Articles in Press, Accepted Manuscript, Available Online from 29 December 2023

https://doi.org/10.22034/jast.2023.417448.1160

Abstract
  In this research, the effects of canard flow on a diamond wing equipped with LEX, same as new-generation fighters, have been investigated, using a closed-circuit wind tunnel. All tests were performed at a speed of 12.5 meters per second, which is equivalent to Reynolds number 214000 based on model length. ...  Read More

Aerospace Science and Technology
Investigation of effective parameters on graphite distribution in FGM structure of A356/Al2O3/Gr composite

Ali Alizadeh; Mohsen Heydari Beni; Jafar Eskandari Jam

Articles in Press, Accepted Manuscript, Available Online from 27 January 2024

https://doi.org/10.22034/jast.2024.430111.1171

Abstract
  In this research, aluminum/alumina/graphite hybrid composite was prepared by horizontal centrifugal casting method, and the microstructure and distribution of alumina and graphite particles in the radial direction of the cross-sectional area of the samples were investigated. The distribution of graphite ...  Read More

Aerospace Science and Technology
Analyzing the effect of helicopter pilot cushion on body vibrations through numerical and analytical investigation

Heshmatollah MohammadKhanlo; Ali Nouri; Seyed Mohammad Kamali

Articles in Press, Accepted Manuscript, Available Online from 06 February 2024

https://doi.org/10.22034/jast.2024.419274.1164

Abstract
  Exposure to vibrations of certain frequencies can pose a risk to the pilot's body. During flight, the maneuvers performed by the pilot expose them to sudden and unfavorable accelerations, which can cause physical, physiological, and psychological problems. Research suggests that the use of seat suspension ...  Read More

Aerospace Science and Technology
Experimental assessment of the air flow induced vibration of a single cylinder with a cantilever beam

Reza Mahmoodpoor; Amir Kiyoumarsioskouei; Amin Taraghi Osguei; Leila Donyaparast

Articles in Press, Accepted Manuscript, Available Online from 29 March 2024

https://doi.org/10.22034/jast.2024.445963.1178

Abstract
  The focus on different energy harvesting methods has led to various studies on the mechanism of flow-induced vibration phenomena, including vortex-induced vibration, galloping, and wake-galloping. In this study, an experimental investigation on flow around a cylinder with an elastic cantilever beam has ...  Read More

Aerospace Science and Technology
Prediction of Earth Orientation Parameters using a hybrid Attention-based CNN-GRU Model with a Coordinate Transformation Approach

Majid Bakhtiari; Amirhossein Panahyazdan; Siavash Sabzy

Articles in Press, Accepted Manuscript, Available Online from 02 April 2024

https://doi.org/10.22034/jast.2024.442700.1174

Abstract
  The Earth Orientation parameters (EOPs), such as polar motion, universal time, and length of day, play a prominent role in procedures such as monitoring the Earth's rotation, weather modeling, and disaster prevention. This paper estimates the EOPs series based on a combined series approach proposed ...  Read More

Aerospace Science and Technology
Experimental study of characteristics of plasma action on helium flow in cold atmospheric pressure plasma jet

Gholamhosein Pouryoussefi; Sara Javanmard; MohamadAli Heidari

Articles in Press, Accepted Manuscript, Available Online from 08 April 2024

https://doi.org/10.22034/jast.2024.447857.1180

Abstract
  In this study, the performance of a cold atmospheric pressure plasma jet using neutral helium gas was experimentally investigated. Cold atmospheric pressure helium plasma jets have gained popularity in various processing applications due to their stability and enhanced reaction chemistry. The researchers ...  Read More