Wenfang Zhu

Colorimetry characteristics and color clustering of natural gem-quality spinel from Myanmar (Burma)

Jun Tang, Wenfang Zhu, Kaichao Liu, Ying Guo

Color is the most critical factor in determining the value of gem-quality spinel. This paper examines the color mechanism and the colorimetric characteristics of spinel crystals under D65 and A light sources against nine neutral backgrounds. It also explores color clustering for …

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Research on driving fatigue detection model in plateau based on steering wheel indicators

Guo Xuanzhen, Yuchen Wang, Fei Chen, Wenfang Zhu et autres

The low-pressure and low-oxygen environment in plateau regions significantly increases drivers’ psycho-physiological stress, affecting their driving behavior and road safety. This study constructed a simulation model using the UC/win-road simulator to replicate a plateau highway scenario. A fatigue detection model was also …

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Numerical Study on Interior Ballistics of Artillery by Using Two-dimensional Two-phase-flow Model Coupled with Heat Loss Model of Barrel

Yuan Ping Feng, Y.K. Wang, Wenfang Zhu

Abstract In this paper, the numerical model of two-dimensional two-phase-flow interior ballistics coupled with heat loss of barrel was established. By using this model, the interior ballistic processes of a small-caliber artillery with different charge mass were simulated. The distribution and evolution …

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Research on the Correlation between the Barrel Temperature and the Parameters of Interior Ballistic and Charge

Wenfang Zhu, Yuan Feng, Yuwei Wang, Y. Z. Qu

Abstract Aiming at the problem that the barrel life of a large calibre artillery is obviously lower than the international advanced level, and the thermal erosion inside the barrel is serious, based on modern interior ballistic theory and heat transfer theory, a …

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A Near-Colourless HPHT-grown Diamond with Natural-appearing Blue Fluorescence from N3 Centres

Wenfang Zhu, Jiali Jiang, Song Lin

A Novel Single-Loop Kriging Modeling-Based Method for Time-Variant Reliability Analysis

Lijun Yan, Wenfang Zhu, Jianwei Yang, Shiquan Zhang et autres

Time-variant reliability analysis is crucial for enhancing the safety and reliability of products throughout their service life. However, the performance analysis of a complicated mechanical structure typically relies on a time-consuming simulation process, and performing time-variant reliability analysis requires a large number …

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A magnetic field constrained type of multi-barrel common-rail railgun

Wei Guo, Tao Zhang, Zeyuan Mu, Wenfang Zhu et autres

Abstract Adopting the simultaneous launch mode of small and medium caliber railgun is an important means to increase the firepower density, improve the hit probability and strike efficiency. Based on this requirement, this paper creatively proposed a new multi-barrel simultaneous launch EM …

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Simulation study of flushing ablation by gas-solid two phase flow of artillery barrel

Lijun Yan, Yaofeng Xu, Wenfang Zhu, Daye Wang et autres

Abstract For the wear problem of artillery barrel bore during artillery launching, this work uses particle erosion and deposition modules in Fluent Software to simulate the erosion process of gunpowder gas particles on artillery barrel, analyses steady and transient states simulation results, …

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Experimental and Simulation Research of Belt Extrusion Process Based on Simplified Chip Model

Qi Liu, Yuwei Wang, Na Zhao, Wenfang Zhu

The projectile extrusion process is an extremely important part of the initial trajectory of the artillery launch. The differentiation of the extrusion process brings about the stability problem of the extrusion process, which directly affects the stability and safety of the artillery, …

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Research on the Extrusion Process of belt with Notch Descrition

Qi Liu, Yuwei Wang, Wenfang Zhu, Na Zhao

The extrusion process of the belt is a process in which the belt and the inner bore of the barrel undergo complex contact and collision, and the rifling gradually penetrates the belt, so that the material of the belt continues to fail …

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Study on Engraving Resistance Characteristic of Band Based on Different Structure Parameters of Rifling

Qi Liu, Yuwei Wang, Ruijing Li, Wenfang Zhu et autres

Abstract The gun barrel working in complex environments is prone to damage, including the wear and ablation of the bore in the gun barrel. These changes cause changes in the rifling structure, which in turn affects the combustion law of gunpowder gas, …

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Research on high efficiency muzzle brake technology of small caliber automatic gun

J B Liu, Hai Huang, Wenfang Zhu, Y Liu et autres

Abstract Muzzle brake provides a recoil force by controlling the powder gas flow distribution and velocity to reduce the recoil energy, so the study on the muzzle brake efficiency in reducing the recoil energy plays a great role. A new muzzle brake …

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