Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Investigating selected methods to improve aerodynamic coefficients and better performance of UAV

Mohamad hossein Moghimi Esfandabadi; Mohammad Hassan Djavareshkian

Volume 8, Issue 3 , September 2024, , Pages 1-16

https://doi.org/10.22034/jtae.2024.8.3.1

Abstract
  An unmanned aircraft (UAV) is a type of aircraft that operates without the need for a human passenger. These planes are able to fly automatically, without the need for remote control, and are mostly controlled by computers and sensors. UAVs are used in many industries and have various applications, including ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Design and optimization of the wing fence of a lambda-shaped aircraft model to reduce the rolling moment coefficient

Mohammad hossein Moghimi Esfandabadi; Mohammad Hassan Djavareshkian

Volume 8, Issue 2 , June 2024, , Pages 13-25

https://doi.org/10.22034/jtae.2024.8.2.2

Abstract
  This research investigates the effect of fence on wingtip vortices and control surfaces in a bird-like aircraft using numerical methods. In designing and placing the fence, average dimensions extracted from wing root vortices at different angles of attack have been used. In addition, the fence with specified ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Design and fabrication of smart small airfoil using surface deformation and experimental study of aerodynamic properties

Ramin Zakeri

Volume 8, Issue 1 , April 2024, , Pages 15-25

https://doi.org/10.22034/jtae.2024.8.1.2

Abstract
  In this article, the deformable structures of a symmetrical airfoil and the discussion of aerodynamic forces are discussed inside the wind tunnel with miniature dimensions. The problem, which is checked in this article, is the investigation the effect of surface deformation in a small airfoil. In order ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Methods for Attenuation of Helicopter

Hamid Parhizkar; Ali Moradi; Alireza Hejazi zade

Volume 7, Issue 3 , September 2023, , Pages 69-84

https://doi.org/10.30699/jtae.2023.7.3.6

Abstract
  Helicopters can be a source of loud noise. The high production noise of helicopters makes them unsuitable for densely populated areas, especially in low-flying conditions. This study examines methods and offers solutions to reduce or eliminate the noise produced by helicopters. Several methods have been ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Aerodynamic/Aeroacoustic Numerical Simulation and Manufaturing of a Sample Morphing Wing in Twisted Mode

Reza Harbi Monfared; Mohammad Taeibi Rahni; Masoud Zareh

Volume 7, Issue 2 , June 2023, , Pages 1-9

https://doi.org/10.30699/jtae.2023.7.2.1

Abstract
  Inspiring from bird’s wings and flights has long been a fascinating subject. In recent years, due to advent of materials and implementation of bird’s flights, use of morphing wings have created considerable changes in scientific issues related to air vehicles. In this article, for the first ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Numerical Calculation Of Aerodynamic Loads Of Helicopter Rotor Using CFD / BET Method

Mehdi Naderi Nezhad; Navid Fakhralmobasheri; Eisa Atoof

Volume 6, Issue 4 , February 2023, , Pages 13-24

https://doi.org/10.22034/jtae.2023.6.4.2

Abstract
  Considering the complexity of analyzing the phenomena affecting the aerodynamic performance of the main rotor helicopter and how to simulate the dynamic movements of the blade relative to the center of rotation, Using methods such as blade element theory together with computational fluid dynamics can ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Effect of amplitude and wavelength of the sinusoidal leading edge of the tubercled wing in post-stall condition

amirfarhang Nikkhoo; Ali Esmaeili

Volume 6, Issue 4 , February 2023, , Pages 47-56

https://doi.org/10.22034/jtae.2023.6.4.5

Abstract
  In this study, the variation of amplitude and wavelength of the sinusoidal wing in the post-stall condition have been studied to evaluate the effect of each of these parameters on the control of the stall phenomenon and the stall’s sensitivity to Each of these two parameters is measured. For this ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Simulation of the Aerodynamic Performance of a Symmetrical Airfoil Using Dissipative Dynamic Particle Method

Rokhshaad Dashti gohari; Ramin Zakeri; Mohammad Mohsen Shahmardan; Mohsen Nazari

Volume 6, Issue 2 , September 2022, , Pages 23-39

https://doi.org/10.22034/jtae.2022.302257.1192

Abstract
  This paper uses the dissipative particle dynamic method to simulate the flow around a micro-airfoil. Due to the common problem in applying boundary conditions and the lack of aerodynamic study of objects in this molecular method, we decided to study this field. In this study, periodic boundary conditions ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Methods for Attenuation of Unmanned Aerial Vehicle Noise

Mostafa Mahmoodi; Ali Moradi

Volume 6, Issue 2 , September 2022, , Pages 71-83

https://doi.org/10.22034/jtae.2022.316532.1215

Abstract
  Unmanned aerial vehicles (UAVs) like drones (quadcopters, hexacopters, octocopters, etc.) can be a source of significant acoustic noise. High noise makes them less suitable for use in densely populated urban areas, particularly during take-off, landing, and low-level flight, due to the noise annoyance. ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Simulation of Aerodynamic Properties of Rarefied Gas Flow on Satellite Panel by DSMC Method

SAIED ESKANDARI; Ramin Zakeri; Ali sarreshtedari

Volume 6, Issue 1 , June 2022, , Pages 45-52

https://doi.org/10.22034/jtae.2022.310768.1207

Abstract
  In this research, the method of simulating the rarefied gas flow on a flat plate and calculating aerodynamic properties have been investigated using direct simulation Monte Carlo or DSMC-Open Foam Software. One of the most efficient methods for simulating rarefied gas flow in nonequilibrium conditions ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Unsteady Aerodynamic Analysis of Airfoils and Aircraft Wings to Gust Inlet Function

Babak Moradi; Hassan Isavand

Volume 5, Issue 4 , February 2022, , Pages 1-10

https://doi.org/10.22034/jtae.2022.145233

Abstract
  In this paper, the modeling method of aircraft aerodynamic responses to the 1-cos gust profile is presented. Test cases considered are, a two-dimensional NACA0012 airfoil was used to verify the method and two-dimensional NACA23012, NACA23015, and NACA23016.5 airfoils of the wing of a light aircraft and ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
The formation of respiratory droplets caused by breathing, coughing, and sneezing in patients with Covid-19 and the role of wearing a mask in controlling its spread

Seyyedeh Kokab Goharain; Mohammad Taeibi Rahni

Volume 5, Issue 3 , November 2021, , Pages 37-47

https://doi.org/10.22034/jtae.2021.129735

Abstract
  The sudden spread of Covid-19 in the world has attracted everyone's attention. In addition, due to the unknown and lack of definitive treatment methods, the World Health Organization and other medical institutions recommend non-pharmacological solutions to control the virus. In this regard, one of the ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Numerical and Analytical Study of Acoustic Liner Absorption Coefficient to Reduce Turbofan Engine Noise

Iman Bahman-Jahromi; Hadi Dastourani

Volume 5, Issue 2 , August 2021, , Pages 11-18

https://doi.org/10.22034/jtae.2021.129742

Abstract
  Due to environmental requirements in reducing aircraft noise, using acoustic liners at the inlet of turbofan engines is necessary. These liners are designed in different geometries. Understanding the effects of different parameters in the design of these liners is essential. In this paper, one of the ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Improving the Aerodynamic Performance of Radial Gas Microturbine with Double Curvature Blades

Reza Aghaei Togh; Marziyeh Ahmadi; Mohamadhasan Nobakhti

Volume 4, Issue 4 , February 2021, , Pages 21-30

Abstract
  This research aims to improve aerodynamic performance of a radial gas microturbine from input to output, so that the best case can be selected. In this work, ANSYS CFX software was used. First, using one-dimensional model, different states were investigated and the best mode was selected. Then, by solving ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Morphing Wings- A Novel Design in Aviation Industry

Reza Harbi Monfared; Mohamad Taeibi Rahni; Masoud Zareh

Volume 4, Issue 4 , February 2021, , Pages 66-55

Abstract
  This article aims to study and investigate morphing wings, based on bierd’s wings, and their effects on air vehicles. This is modeled after shapes of wings and flight of birds throughout the world. First, the shape of beird’s wings and their use during defferent hight situation are investigated. ...  Read More