cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
A. Grummy Wailanduw
Contact Email
grummywailanduw@unesa.ac.id
Phone
+6285730235172
Journal Mail Official
jurnalotopro@unesa.ac.id
Editorial Address
Jurusan Teknik Mesin Fakultas Teknik Universitas Negeri Surabaya Gedung A6 Kampus UNESA Ketintang Surabaya 60231 Telp. (031) 8299487, Fax. (031) 8292957
Location
Kota surabaya,
Jawa timur
INDONESIA
Otopro
Published by Universitas Negeri Surabaya
ISSN : 1858411X     EISSN : 26857863     DOI : http://dx.doi.org/1026740/otopro
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Otopro diterbitkan 2 (dua) kali setahun yaitu bulan Mei dan November oleh Jurusan Teknik Mesin, FT-UNESA, sebagai media informasi dan forum kajian masalah ilmu Teknik Mesin. Berisi tentang tulisan ilmiah, ringkasan hasil penelitian, pembahasan kepustakaan dan gagasan kritis yang orisinil. Redaksi mengundang para ahli, praktisi, dan siapa saja yang berminat untuk menyumbangkan tulisan yang belum pernah diterbitkan dalam media cetak lain, tema tulisan meliputi: Permesinan, Konversi Energi, Material dan Metalurgi, Manufaktur, Rancang Bangun Mesin
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 171 Documents
 14   15   16   17   18 
NUMERICAL INVESTIGATION OF REAR WINDSHIELD ANGLE AND REYNOLDS NUMBER EFFECTS ON THE AERODYNAMIC PERFORMANCE OF A SALOON CAR Dwi Tarti; Ika Nurjannah; Herman Sasongko
Otopro Vol 21 No 2 May 2026
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v21n2.p85-94

Abstract

This study examined how rear windshield angle and body geometry affect the aerodynamic behavior of a saloon car model using numerical simulations. Rear windshield angles of 45°, 60°, 75°, and 90° were considered for two configurations—sharp and rounded rear corners— whereas the front windshield angle was kept constant at 30% to allow a consistent comparison. Simulations were conducted at two Reynolds numbers, 6.5×10⁶ and 11.8×10⁶, corresponding to inlet velocities of 22.2m/s and 40m/s. The simulations were performed using ANSYS Fluent 2024, focusing on the flow behavior along the upper and lower surfaces, as well as the resulting drag and lift characteristics. The results showed that increasing the rear windshield angle generally led to higher drag, mainly due to the expansion of the wake region behind the vehicle. Models with rounded corners consistently performed better than sharp-edged ones, producing lower drag and more stable flow behavior. The lowest drag coefficient (CD=0.556) was found for the rounded configuration at a 45° rear windshield angle, whereas the highest value (CD=0.8147) appeared in the sharp configuration at 90°. From the flow visualization, it can be seen that the sharp edges create stronger adverse pressure gradients, which trigger earlier separation and lead to a larger wake. In contrast, rounded corners helped the flow to recover more smoothly and delayed separation. Overall, these findings emphasize the role of the rear windshield angle and body geometry in improving aerodynamic efficiency and minimizing energy losses.

Page 18 of 18 | Total Record : 171

 14   15   16   17   18 

Filter by Year

2017 2026


Reset
Filter By Issues
All Issue Vol 21 No 2 May 2026 Vol 21 No 1 Nov 2025 Vol 20 No 2 Mei 2025 Vol 20 No 1 Nov 2024 Vol 19 No 2 Mei 2024 Vol 19 No 1 Nov 2023 Vol 18 No 2 Mei 2023 Vol 18 No 1 Nov 2022 Vol 17 No 2 Mei 2022 Vol 17 No 1 Nov 2021 Vol 16, No 2 (2021) Vol 16 No 2 Mei 2021 Vol 16, No 1 (2020) Vol 16 No 1 Nov 2020 Vol 15 No 2 Mei 2020 Vol 15, No 2 (2020) Vol 15, No 1 (2019) Vol 15 No 1 Nov 2019 Vol 14, No 2 (2019) Vol 14 No 2 Mei 2019 vol 14 No 1 Nov 2018 Vol 13 No 2 Mei 2018 Vol 13 No 1 Nov 2017 Vol 12 No 2 Mei 2017 Vol 14, No 1 (2018) Vol 13, No 2 (2018) Vol 13, No 1 (2017) Vol 12, No 2 (2017) More Issue