Optimum Operating Parameters and Blade Setting of a High-Speed Propeller

Boulkeraa, Tayeb; Ghenaiet, Adel; Benini, Ernesto

doi:10.2514/1.c035861

Cited by 1 publication

(1 citation statement)

References 28 publications

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“…The initial condition setting and motion process simulation of debris ow is a process of simulating and predicting its motion process by reasonably selecting and setting the initial condition parameters of debris ow and combining with numerical simulation method. First, the setting of initial conditions includes the determination of parameters such as the initial position, initial velocity, and morphological characteristics of debris ow [30,31]. These parameters can be obtained by means of eld investigation and remote sensing data analysis.…”

Section: Initial Condition Setting and Motion Process Simulation Of D...mentioning

confidence: 99%

Numerical Simulation of Debris Flow Disaster in Yunnan Mountainous Areas Guided by Discrete Element Tracing Method

He,

Li,

Liu

2023

Preprint

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The purpose of this study is to accurately predict and evaluate the occurrence, development, and impact of debris flow disasters, and to further improve the accuracy of debris flow disaster prediction by comparing the simulation results of high-performance algorithms with the measured data and other numerical simulation methods. Discrete Element Tracking Method (DETM) is adopted as a numerical simulation method. Debris flow is regarded as a non-Newtonian fluid composed of many discrete particles, and the motion state and deformation characteristics of debris flow are calculated by tracking the position, velocity, and force of each particle. This study takes a typical debris flow channel in Yunnan Province as an example. Firstly, a three-dimensional (3D) terrain model is established, including the length, width, slope, and curvature of the channel. Secondly, according to the physical characteristics of debris flow, the initial conditions of debris flow are set. Finally, the movement process of debris flow is simulated by DETM, and the position, speed, and force of each particle in the process of debris flow movement are tracked. The numerical simulation results are compared with those of the Finite Element Difference Method (FEDM), and the simulation results are checked with the data in the national debris flow database. It is found that the coincidence degree of debris flow deposition range guided by DETM and debris flow database is 0.89 (FEDM is 0.76). The root mean square error (RMSE) of debris flow deposition thickness and debris flow database is 0.04 (FEDM is 0.23). The relative error of debris flow deposition volume and debris flow database is 0.06 (FEDM is 0.15). The relative error of debris flow movement time and debris flow database is 0.03 (FEDM is 0.19). These results show that DETM can well predict the actual situation of debris flow disasters in mountainous areas of Yunnan. This study not only provides a new tool and basis for the prediction and prevention of debris flow disasters, but also provides a new idea and method for the application of DETM in simulating other non-Newtonian fluids.

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Section: Initial Condition Setting and Motion Process Simulation Of D...mentioning

confidence: 99%