Structure optimization of straight cone nozzle and its effect on jet impingement heat transfer

Yang, Han; Zhang, Xinru; Yuan, Guo; Li, Zhenlei; Zhang, Fubo

doi:10.1080/10407782.2023.2279256

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…Response surface methods are frequently employed to explore the nonlinear effects of numerous variables on the response variable in a particular range and alter them based on practical demands [33]. Han et al [34] used the response surface methodology to optimize the internal structural parameters for the key part of a straight cone nozzle, with the flow coefficient used as the objective function. Zhang et al [35] proposed a dual serpentine nozzle structure and analyzed the influence of key structural parameters on its aerodynamic performance using computational fluid dynamics and the response surface methodology.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Composite Cavitation Nozzle Parameters Based on the Response Surface Methodology

Huang,

Qiu,

Song

et al. 2024

Water

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Cavitation is typically observed when high-pressure submerged water jets are used. A composite nozzle, based on an organ pipe, can increase shear stress on the incoming flow, significantly enhancing cavitation performance by stacking Helmholtz cavities in series. In the present work, the flow field of the composite nozzle was numerically simulated using Large Eddy Simulation and was paired with the response surface method for global optimizing the crucial parameters of the composite nozzle to examine their effect on cavitation behavior. Utilizing peak gas-phase volume percent as the dependent variable and the runner diameter, Helmholtz chamber diameter, and Helmholtz chamber length as independent variables, a mathematical model was constructed to determine the ideal parameters of the composite nozzle through response surface methodology. The optimized nozzle prediction had an error of only 2.04% compared to the simulation results, confirming the accuracy of the model. To learn more about the cavitation cloud properties, an experimental setup for high-pressure cavitation jets was also constructed. Impact force measurements and high-speed photography tests were among the experiments conducted. The simulated evolution period of cavitation cloud characteristics is highly consistent with the experimental period. In the impact force measurement experiment, the simulated impact force oscillates between 256 and 297 N, and the measured impact force oscillates between 260 N and 289 N, with an error between 1.5% and 2.7%. The simulation model was verified by experimental results. This study provides new insights for the development of cavitation jet nozzle design theory.

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Section: Introductionmentioning

confidence: 99%

Optimization of Composite Cavitation Nozzle Parameters Based on the Response Surface Methodology

Huang,

Qiu,

Song

et al. 2024

Water

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Study on the effect law of jet angle on the cooling of hot-rolled L-beam

Li,

Zhao,

Zhang

et al. 2024

Numerical Heat Transfer, Part A: Applications

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A Review of Flow Field and Heat Transfer Characteristics of Jet Impingement from Special-Shaped Holes

Xu,

Hu,

Lin

et al. 2024

Energies

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The jet impingement cooling technique is regarded as one of the most effective enhanced heat transfer techniques with a single-phase medium. However, in order to facilitate manufacturing, impingement with a large number of smooth circular hole jets is used in engineering. With the increasing maturity of additive technology, some new special-shaped holes (SSHs) may be used to further improve the cooling efficiency of jet impingement. Secondly, the heat transfer coefficient of the whole jet varies greatly on the impact target surface. The experiments with a large number of single smooth circular hole jets show that the heat transfer coefficient of the impact target surface will form a bell distribution—that is, the Nusselt number has a maximum value near the stagnation region, and then rapidly decreases exponentially in the radial direction away from the stagnation region. The overall surface temperature distribution is very uneven, and the target surface will form an array of cold spots, resulting in a high level of thermal stress, which will greatly weaken the structural strength and life of the equipment. Establishing how to ensure the uniformity of jet impingement cooling has become a new problem to be solved. In order to achieve uniform cooling, special-shaped holes that generate a swirling flow may be a solution. This paper presents a summary of the effects of holes with different geometrical features on the flow field and heat transfer characteristics of jet impingement cooling. In addition, the effect of jet impingement cooling with SSHs in different array methods is compared. The current challenges of jet impingement cooling technology with SSHs are discussed, as well as the prospects for possible future advances.

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Structure optimization of straight cone nozzle and its effect on jet impingement heat transfer

Cited by 3 publications

References 33 publications

Optimization of Composite Cavitation Nozzle Parameters Based on the Response Surface Methodology

Optimization of Composite Cavitation Nozzle Parameters Based on the Response Surface Methodology

Study on the effect law of jet angle on the cooling of hot-rolled L-beam

A Review of Flow Field and Heat Transfer Characteristics of Jet Impingement from Special-Shaped Holes

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