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A comprehensive exploration of ejector design, operational factors, performance metrics, and practical applications

  • Review Paper
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Abstract

The purpose of this paper is to provide the review details on the research attempt made in the field of ejector systems. This review paper provides details on design methodology, geometrical parameters, operating parameters effect, CFD studies, turbulence model selection, working fluid, and irreversibility of the ejector system. The journey of two-stage ejectors with their geometrical details and auxiliary entrainment positions is also presented. It gives a higher entrainment ratio as compared with a single-stage ejector. The new techniques, constant rate of momentum change and constant rate of kinetic energy, also came into the knowledge to design physics-based single and two-stage ejectors. This method helped in the design to create variable area geometry of the nozzle, mixing, and diffuser. This helps to remove the thermodynamic loss or irreversibility of conventional ejectors due to sudden area change at the exit/inlet of the diffuser section. In addition, the performance of the ejector, including entrainment ratio, nozzle exit position, and back pressure effect, is also presented. Finally, the effect of different working fluids on the performance of the ejector and application with various fields is also reviewed.

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Abbreviations

CRKEC:

Constant rate of kinetic energy change

CRMC:

Constant rate of momentum change

CAM:

Constant area mixing

CPM:

Constant pressure mixing

CFD:

Computational fluid dynamics

TVC:

Thrust vector control

TR:

Thrust reversal

AR:

Area ratio

NXP:

Nozzle exit position

RANS:

Reynolds averaged Navier–Stokes

SSE:

Single-stage ejector

TSE:

Two-stage ejector

COP:

Coeficient of performance

SST:

Shear stress transport

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  1. Department of Mechanical Engineering, K. R. Mangalam University, Gurugram, 122001, India

    Arvind Kumar & Surendra Kumar Yadav

  2. Department of Mechanical Engineering, Harcourt Butler Technical University, Kanpur, 208002, India

    Virendra Kumar

  3. Department of Mechanical Engineering, MIT - World Peace University, Pune, 411038, India

    Abhishek Kulkarni

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Kumar, A., Yadav, S.K., Kumar, V. et al. A comprehensive exploration of ejector design, operational factors, performance metrics, and practical applications. J Braz. Soc. Mech. Sci. Eng. 46, 39 (2024). https://doi.org/10.1007/s40430-023-04618-8

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