Ünal, Mehmet Fevzi

Profile URL
https://hdl.handle.net/20.500.11779/2685
Name Variants
Unal, M.F. & Ünal, Mehmet Fevzi & Ünal, M. Fevzi & Ünal, MF & Ünal, M.F. & UNAL, MF & Unal, MF
Job Title
Email Address
unalf@mef.edu.tr
Main Affiliation
02.03. Department of Mechanical Engineering
Status
Current Staff
Website
ORCID ID
0000-0002-0781-1514
Scopus Author ID
56321078900
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
AAH-2271-2020
Files
1728698448-academic-1400000087.avif (17.73 KB)

Research Topics

Domains
Physical Sciences
Fields
EngineeringEnvironmental Science
Subfields
Computational MechanicsEnvironmental EngineeringAerospace Engineering
Specific Research Areas
Fluid Dynamics and Vibration Analysis
Fluid Dynamics and Turbulent Flows
Wind and Air Flow Studies
Aerodynamics and Fluid Dynamics Research
Fluid Dynamics Simulations and Interactions

Sustainable Development Goals

SDG data is not available
Documents

17

Citations

696

h-index

8

Go to Scopus profile
Documents

14

Citations

561

Go to WoS profile

Publication Collaboration

Affiliation Name Count
Istanbul Technical University 14
Lehigh University 5
TBS Education 2
MEF University 2
University of British Columbia 2
1 / 2
Data obtained from OpenAlex
Scholarly Output

3

Articles

2

Views / Downloads

504/28

Supervised MSc Theses

0

Supervised PhD Theses

0

WoS Citation Count

7

Scopus Citation Count

9

Patents

0

Projects

0

WoS Citations per Publication

2.33

Scopus Citations per Publication

3.00

Open Access Source

1

Supervised Theses

0

JournalCount
68th Annual Meeting of the APS Division of Fluid Dynamics1
Physics of Fluids1
Theoretical and Computational Fluid Dynamics1
Current Page: 1 / 1

Scopus Quartile Distribution

Competency Cloud

GCRIS Competency Cloud

Filters

2015 - 201922020 - 20221

Settings

Author of Publication: search.filters.isAuthorOfPublication.88edd007-14d0-46e0-b61c-a0a7ca54c45d

Scholarly Output Search Results

Now showing 1 - 3 of 3
  • Article
    Citation - WoS: 7
    Citation - Scopus: 7
    Propulsive Performance of Plunging Airfoils in Biplane Configuration
    (American Institute of Physics Inc., 2022-03-01) Yücel, S. Banu; Şahin, Mehmet; Ünal, Mehmet Fevzi
    Biplane configuration of pure plunging airfoils is investigated in terms of vortex dynamics both experimentally and numerically by utilizing particle image velocimetry and unstructured finite volume solver of incompressible unsteady Navier-Stokes equations. Experiments are carried out to disclose the vortex shedding and interaction mechanisms for various values of frequency and amplitude of the plunging motion. For the non-dimensional plunge amplitude with respect to the chord of airfoil h = 0.2, the effect of the reduced circular frequency based on chord length and the free stream velocity k = 1 and 10 are considered, whereas for h = 0.3, k = 2, 4, 8, and 10 cases are examined. Influence of the plunge amplitude is studied for h = 0.25 at k = 2.5 and for h = 0.0875, 0.15, and 0.3 at k = 4. Numerical simulations are performed to investigate the effect of phase difference on vortex structures and propulsive characteristics, such as thrust and Froude efficiency. Two cases having the highest thrust and efficiency values k = 2.5, h = 0.25, and k = 4, h = 0.15 value couples are selected for the phase angle of φ = 0 °, φ = 90 °, φ = 180 °, and φ = 270 °. Opposed plunge, φ = 180 °, was found as the most efficient amongst all phase angles that were investigated, where φ = 90 ° is beneficial in lift production. Additionally, three-dimensional simulations indicate no significant three dimensionalities for the parameters used herein.
  • Conference Object
  • Article
    Citation - Scopus: 2
    Strong Transient Effects of the Flow Around a Harmonically Plunging Naca0012 Airfoil at Low Reynolds Numbers
    (Springer, 2015-09-19) Yücel, S. Banu; Şahin, Mehmet; Ünal, M. Fevzi
    Abstract The flow pattern around a NACA0012 airfoil undergoing harmonic plunging motion corresponding to the deflected wake phenomenon reported by Jones and Platzer (Exp Fluids 46:799–810, 2009) is investigated in detail using direct numerical simulations. An arbitrary Lagrangian–Eulerian formulation based on an unstructured side-centered finite volume method is utilized in order to solve the incompressible unsteady Navier–Stokes equations. The Reynolds number is chosen to be 252, and the reduced frequency of plunging motion (k = 2?fc/U?) and the plunge amplitude non-dimensionalized with respect to chord are set to be 12.3 and 0.12, respectively, as in the experimental study of Jones and Platzer (2009). The present numerical simulations reveal a highly persistent transient effect, and it takes two orders of magnitude larger duration than the heave period to reach the time-periodic state. In addition, the three-dimensional simulation reveals that the flow field is three-dimensional for the parameters used herein. The calculation reproduces the deflected wake and shows a good agreement with the experimental wake pattern. The instantaneous vorticity contours, finite-time Lyapunov exponent fields and particle traces are presented along with the aerodynamic parameters including the lift and thrust coefficients.