Turbo : Jurnal Program Studi Teknik Mesin
Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin

THE EFFECT OF OFFSET RATIO ON OFFSET JET FLOW STRUCTURE

Rifqi Ramadhani (Universitas Pembangunan Nasional Veteran Jakarta)
James Julian (Universitas Pembangunan Nasional Veteran Jakarta)
Fitri Wahyuni (Universitas Pembangunan Nasional Veteran Jakarta)
Riki Hendra Purba (Universitas Pembangunan Nasional Veteran Jakarta)
Fathin Muhammad Madhudhu (Universitas Pembangunan Nasional Veteran Jakarta)
Elvi Armadani (Universitas Pembangunan Nasional Veteran Jakarta)



Article Info

Publish Date
31 Dec 2025

Abstract

Jet flow is a crucial fluid dynamic phenomenon that has been extensively studied. It is essential for various industrial applications, including surface cleaning, flow control, and cooling electronic components.  Offset jet is an innovation in jet flow configuration that offers advantages in flow pattern control by expanding the impingement area and regulating surface pressure distribution. This study employed a Computational Fluid Dynamics (CFD) approach to investigate the influence of variations in the offset jet ratio on the aerodynamic characteristics of the flow, specifically the impingement zone area, pressure coefficient distribution, and skin friction coefficient. The standard k-ε turbulence model, utilizing a structured mesh and a Reynolds number of 10,000, was employed in this research. The number of mesh elements used was a fine mesh of 200,000 with an error percentage of 0.09436%. The results of the study show that an offset ratio of 3 produces the highest cf value of 0.0047 and a stable Cp distribution of 0.218, while also providing the best impingement zone area. These findings indicate that OR 3 is the most optimal configuration in terms of aerodynamics for precision system applications, with a focus on flow pattern control and wide impingement zone coverage.

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Journal Info

Abbrev

turbo

Publisher

Subject

Mechanical Engineering

Description

TURBO ISSN (print version) 2301-6663 & ISSN (online version) 2477-250X is a peer-reviewed journal that publishes scientific articles from the disciplines of mechanical engineering, which includes the field of study (peer) material, production and manufacturing, construction and energy conversion. ...