Multi-objective optimization of a flow straightener in a large capacity firefighting water cannon

Xiang, Qingjiang; Xue, Lu‐Lu; Kim, Kwang‐Yong; Shi, Zhefu

doi:10.1007/s42241-019-0018-0

Cited by 8 publications

(6 citation statements)

References 12 publications

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“…A multi-objective optimization of a flow straightener in a firefighting water cannon is performed by using the surrogate modelling and a hybrid multi-objective genetic algorithm to increase the jet range of the water cannon. Based on analysis using the three-dimensional Reynolds-averaged Navier-Stokes equations, the optimization is carried with a surrogate model and the radial basis neural network (Xiang, 2019).…”

Section: Rettore Neto 2014)mentioning

confidence: 99%

Fluid Analysis and Optimization Design of Spraying Pipe of Integrated Pumping and Discharging Fertilizer Truck

Bian

Tao

2022

INMATEH

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According to the flow calculation, the basic structure of the sprinkler pipe of the integrated suction and drainage fertilizer truck was designed. Based on the 3D CAD / CAE Software SolidWorks / flow simulation platform, the structural models of three kinds of sprinkler pipes with different layout forms of outlet pipes were established, and the fluid analysis was carried out. According to the distribution of pressure, velocity and flow trace number in the tube, the optimal structure was obtained.

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Section: Rettore Neto 2014)mentioning

confidence: 99%

Fluid Analysis and Optimization Design of Spraying Pipe of Integrated Pumping and Discharging Fertilizer Truck

Bian

Tao

2022

INMATEH

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“…where a is the jet velocity, c is the disturbance wave velocity, and K N is the coefficient which is related to the diameter of pipeline oscillating chamber. The above Equations (6), (11), (13), (15), and (17) can be applied as a reference for the design of the OH self-excited nozzle.…”

Section: Structural Principle Of Helmholtz Nozzlesmentioning

confidence: 99%

“…Mechanical producing pulsed waterjets. Though these methods have been successfully applied, the equipment for mechanical methods is complex and the reliability is not satisfactory [11][12][13]. In order to get more powerful waterjets with simpler devices, self-excited oscillation waterjets are becoming the hotspot in the field of waterjets.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Jet Pressure Performance of Organ–Helmholtz (O-H), Self-Excited Oscillating Nozzles

Wang

et al. 2020

Energies

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To make a better application of the self-excited oscillation jet, a compound organ–Helmholtz oscillation nozzle (OH nozzle) was designed to generate better pulse effects in the present study. The effects of geometric parameters on pressure characteristics of self-excited oscillation jets were investigated experimentally. The geometric parameters of OH nozzles were determined based on the design principle of the organ-pipe and Helmholtz nozzles. Various types of OH nozzles were tested to obtain the relationship between oscillation pressure and geometric parameters. Experimental results showed that some structural parameters are sensitive to the pump pressure, while others are not. The optimum geometric optimum parameters were obtained based on experimental results. The peak pressure and pressure pulsation amplitude are closely related to the target distance. The peak pressure decreases sharply with target distance at first and decreases with a further increase of the target distance. The peak pressure becomes stable beyond a certain range of target distance. With the increase of the target distance, the pressure pulsation amplitude increases at first and then decreases. The optimum target distance was determined based on experimental results to achieve better pulsation performance and has a value of 20 mm in the present study.

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“…Wan et al (2007) took the mass of the jet microelement as a unit mass and explored the jet trajectory, but the water pressure and flow parameters were missing from this equation. Xiang et al (2017) assumed that the jet microelement was a spherical liquid mass with the same diameter as the nozzle and applied ballistic trajectory theory to solve the jet trajectory of a firefighting water cannon; however, the study was based on the flight trajectory of a single water droplet and did not consider the fragmentation of the droplet along the spray direction. Zhang et al (2015, 2017) simulated the droplet particle size distribution and spray range of refractive nozzles under windy and windless conditions based on the nozzle jet model and ballistic trajectory equations to calculate the nozzle uniformity and a reasonable combination of spacings.…”

Section: Introductionmentioning

confidence: 99%

Modelling the spray range of rotating nozzles based on modified ballistic trajectory equation parameters

Zhang

Liu

Zhu

et al. 2023

Irrigation and Drainage

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The nozzle spray range is an important parameter in the design of sprinkler systems because it affects the wetted area and water application rate. In this study, the jet deformation parameter kjet, which can measure the mass and shape of the jet microelement, was investigated, and a spray range prediction model for a rotating nozzle was established based on the modified ballistic trajectory equation. A comparison verified the accuracy of the model, and the degree of influence of different factors on the spray range was analysed. The results showed the following: (1) The dimension of the jet deformation parameter kjet is the length L, which is a function of the nozzle diameter, working pressure and nozzle elevation angle. (2) The maximum mean absolute error and root mean square error of the current model at a nozzle elevation angle of 24° were 2.038 and 1.603, respectively, representing a maximum increase in prediction accuracy of 87% and 86.7%, respectively, over other models at the same angle. (3) A sensitivity analysis revealed that the factor with the greatest impact on the nozzle spray range was the nozzle diameter, and the smallest was the nozzle mounting height. (4) The maximum nozzle spray range was positively related to the nozzle diameter and working pressure, and the nozzle elevation angle varied at approximately 30° when the maximum range was reached. This study provides a reference for the design of sprinkler systems and the development of rotating nozzles.

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Multi-objective optimization of a flow straightener in a large capacity firefighting water cannon

Cited by 8 publications

References 12 publications

Fluid Analysis and Optimization Design of Spraying Pipe of Integrated Pumping and Discharging Fertilizer Truck

Fluid Analysis and Optimization Design of Spraying Pipe of Integrated Pumping and Discharging Fertilizer Truck

An Experimental Study on the Jet Pressure Performance of Organ–Helmholtz (O-H), Self-Excited Oscillating Nozzles

Modelling the spray range of rotating nozzles based on modified ballistic trajectory equation parameters

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