Characteristics and Predictions of the Cavitation Inception in a Turbopump Inducer

Kang, Byung Yun; Kim, Dae‐Jin; Choi, Changho

doi:10.6108/kspe.2019.23.1.093

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…Among them, the most common affecting factors are geometric structure, such as hole inclination angle, 11 hole shape, 12,13 SAC volume structure 14 and needle lift. 15 The vortex structure in the diesel nozzle were observed under the constant needle lift and flow rate.…”

Section: Introductionmentioning

confidence: 99%

Investigation of cavitation phenomenon with different fuel temperatures in diesel nozzles

Cao,

He,

Wang

2023

Advances in Mechanical Engineering

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Two-phase cavitating flow in the diesel nozzle has been widely concerned by researchers for a long time. Most of the attention has been paid to irregular geometry-induced cavitation, while the research on string cavitation induced by vortex is relatively less. The two cavitating patterns often occur simultaneously in the nozzle, which are still not understandable for their interaction characteristics. In this paper, it is analyzed that the characteristics of string cavitation and geometry-induced cavitation in the transparent nozzle based on the visual scale-up test bench. In the study of hole-to-hole string cavitation, it is found that when needle lifts elevate, geometry-induced cavitation and hole-to-hole string cavitation are observed all together under the same working condition. The development and stability of hole-to-hole string cavitation are further improved with the increase of fuel temperature. The geometry-induced cavitation and string cavitation interact with each other, that is, geometry-induced cavitation at the nozzle inlet interrupts the hole-to-hole string cavitation inception. The tail of hole-to-hole string cavitation is disturbed by cloud cavitation shedding after its developing into the nozzle hole, leading to fracture in serious cases. At high temperatures, there is a periodic transformation between the needle-originated string cavitation and hole-to-hole string cavitation.

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Section: Introductionmentioning

confidence: 99%

Investigation of cavitation phenomenon with different fuel temperatures in diesel nozzles

Cao,

He,

Wang

2023

Advances in Mechanical Engineering

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A Review of Cavitation Phenomenon and Its Influence on the Spray Atomization in Diesel Injector Nozzles

Cao,

2023

SAE Int. J. Commer. Veh.

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<div>In view of the combustion efficiency and emission performance, various new clean combustion modes put forward higher requirements for the performance of the fuel injection system, and the cavitating two-phase flow characteristics in the injector nozzle have a significant impact on the spray atomization and combustion performance. This article comprehensively discusses and summarizes the factors that affect cavitation and the effectiveness of cavitation, and presents the research status and existent problems under each factor. Among them, viscosity factors are a hot research topic that researchers are passionate about, and physical properties factors still have the value of further in-depth research. However, the importance of material surface factors ranks last since the nozzle material was determined. Establishing a more comprehensive cavitation–atomization model considering various factors is the focus of research on cavitation phenomena. The improved model can ultimately serve high combustion efficiency and great emission performance.</div>

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Characteristics and Predictions of the Cavitation Inception in a Turbopump Inducer

Cited by 2 publications

References 8 publications

Investigation of cavitation phenomenon with different fuel temperatures in diesel nozzles

Investigation of cavitation phenomenon with different fuel temperatures in diesel nozzles

A Review of Cavitation Phenomenon and Its Influence on the Spray Atomization in Diesel Injector Nozzles

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