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Dergiler / International Journal of Thermodynamics / 2026 / Volume: 29 Issue: 3

CFD-Based Investigation of Internal Flow Structure and Geometric Optimization of a Supersonic Ejector

Volkan Tok(EGE ÜNİVERSİTESİ)
Özay Akdemir(EGE ÜNİVERSİTESİ)0000-0001-9024-4751
Sayfa
—
Yayın Tarihi
2026-09-01
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

This study highlights the importance of linking performance to flow structure, providing a more physically grounded basis for ejector analysis and optimization.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:Supersonic ejectors are widely used in refrigeration systems due to their potential to improve system performance.
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Temel Bulgular & Veri:However, their performance is highly sensitive to geometric parameters, requiring both a comprehensive understanding of internal flow behavior and systematic investigation.
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Sonuç & Katkı:This study highlights the importance of linking performance to flow structure, providing a more physically grounded basis for ejector analysis and optimization.
🔬Tür:Modelleme & Sayısal Simülasyon
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Supersonic ejector · entrainment ratio · geometric optimization

Abstract

Supersonic ejectors are widely used in refrigeration systems due to their potential to improve system performance. However, their performance is highly sensitive to geometric parameters, requiring both a comprehensive understanding of internal flow behavior and systematic investigation. In this study, a CFD model validated against experimental data reported in the literature is used to investigate and optimize ejector performance under fixed operating conditions with particular attention to internal flow characteristics. The effects of key geometric parameters are analyzed using single-factor analysis, followed by a multi-factor analysis using an orthogonal test method. According to the CFD results, the optimized configuration increases the entrainment ratio from 0.442 to 0.526, representing an 18.8% improvement. The critical back pressure decreases from 217.2 to 206.2 kPa, corresponding to a 5.04% reduction, indicating a trade-off between entrainment performance and the stable operating range. This study highlights the importance of linking performance to flow structure, providing a more physically grounded basis for ejector analysis and optimization.

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Bu Makaleye Atıf Yap

Tok, V., Akdemir, Ö. (2026). CFD-Based Investigation of Internal Flow Structure and Geometric Optimization of a Supersonic Ejector. International Journal of Thermodynamics, Volume: 29 Issue: 3. https://doi.org/10.5541/ijot.1956546

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