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All Journal Jurnal Rekayasa Mesin Turbo : Jurnal Program Studi Teknik Mesin
Iskandar, Waridho
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Mechanical Engineering

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THE EFFECT OF THE SPLIT NACA 0015 AIRFOIL ON VARIATIONS IN REYNOLDS NUMBER Satria, Muhammad Fari; Julian, James; Wahyuni, Fitri; Iskandar, Waridho
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2845

Abstract

This research will discuss the advantages of a NACA 0015 airfoil with a split configuration under varying Reynolds numbers. Computational Fluid Dynamics (CFD) simulations with a K-epsilon turbulence model were conducted on a two-dimensional split airfoil to achieve this goal. Initially, simulations were carried out for the unsplit airfoil geometry at different Reynolds numbers within an angle of attack (AoA) range of 00 to 250. Subsequently, simulations were performed for the split airfoil geometry at various Reynolds numbers within the same AoA range. The unsplit airfoil experiences stall at AoA greater than 110 degrees, while the split airfoil experiences stall at AoA greater than 130 degrees. Additionally, using a split airfoil enhances Cl, with an average increase of approximately 7-8% across different Reynolds numbers. In addition to the Cl improvement, the split airfoil exhibits lower Cd values than the unsplit airfoil, with an average reduction of about 26-28% across all Reynolds number variations. Overall, using separate airfoils improves the aerodynamic performance of the airfoil, with an average increase in Cl/Cd of approximately 33-37% across all Reynolds number variations. In conclusion, the split airfoil performs better than the unsplit airfoil.
Numerical method to overcome the fluid flow separation on pipe bend 90 using guide vane Sedeq, Khalees; Julian, James; Wahyuni, Fitri; Iskandar, Waridho
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2846

Abstract

Numerical Modelling of NACA 0015 Airfoil Under Erosion Condition Billad, Rayhan Fariansyah; Julian, James; Wahyuni, Fitri; Iskandar, Waridho
Jurnal Rekayasa Mesin Vol. 19 No. 2 (2024): Volume 19, Nomor 2, Agustus 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i2.4992

Abstract

Airfoils that experience erosion with varying Reynolds numbers were studied using numerical methods to determine the effect on the performance of the NACA 0015 airfoil. A Computational Fluid Dynamics (CFD) approach has been used to this research. Reynolds Averaged Navier-Stokes (RANS) was used as the governing equation used in this research. The turbulence model used in this research was k-epsilon model. The Reynolds numbers used are 1.6 × 10⁶, 2 × 10⁶, and 2.5 × 10⁶. This research proves that erosion can reduce the Cl value and increase the Cd value on the NACA 0015 airfoil. Increasing the Reynolds number can also reduce the average Cl value and increase the average Cd value. The decrease in the average value of Cl is 6.561%, 9.392%, and 9.803%, respectively, at Reynolds numbers 1.6 × 10⁶, 2 × 10⁶, and 2.5 × 10⁶. Then, the average Cd value increase is 1.120%, 1.301%, and 1.396%, respectively, at Reynolds numbers 1.6 × 10⁶, 2 × 10⁶, and 2.5 × 10⁶. The contour visualization shows that the airfoil erosion has a pressure contour that increases in the upper chamber and decreases in the lower chamber. This phenomenon also occurs as the Reynolds number increases so that it can reduce the lifting force of the NACA 0015 airfoil. The flow velocity and streamlined contours also show greater circulating flow on the erosion airfoil, which can accelerate the 1 ° AoA stall on the erosion airfoil. The circulating flow also becomes larger as the Reynolds number of the airfoil increases.
Numerical method to overcome the fluid flow separation on pipe bend 90 using guide vane Sedeq, Khalees; Julian, James; Wahyuni, Fitri; Iskandar, Waridho
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2846

Abstract

Co-Authors Billad, Rayhan Fariansyah Fitri Wahyuni James Julian Satria, Muhammad Fari Sedeq, Khalees