Experimental study on the flow characteristics of horizontal pneumatic conveying of stiff shotcrete

Chen, Lianjun; Ma, Hui; Gao, Kang; Sun, Zhenjiao

doi:10.1016/j.jobe.2023.106765

Cited by 1 publication

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“…Field experiments have studied the influence of air velocity, water-cement ratio, and bending-diameter ratio on the inlet and outlet pressure drop and conveying stability of the pneumatic conveying elbow based on the response surface experimental design and data analysis. Among them, the conveying stability is characterized by the pressure variation coefficient (C.V) [40]. The influence of the single-factor and multi-factor interaction on the pressure drop of the elbow and the conveying stability is analyzed.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Elbow Pressure Drop and Conveying Stability of Pneumatic Conveying for Stiff Shotcrete Based on Response Surface Methodology

Sun

et al. 2023

Processes

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The pressure drop and conveying stability caused by the bend significantly affect the pneumatic conveying process of stiff shotcrete, which is the key to solving the problem of long-distance transportation. In this paper, the effects of different air velocities (32 m/s, 36 m/s, 40 m/s), water-cement ratios (0.1, 0.2, and 0.3), and bending-diameter ratios (4, 12, and 20) on the pressure drop of the elbow R1 and conveying stability R2 are studied using the response surface method. The conveying stability is characterized by the pressure variation coefficient (C.V). The response surface graph aids in the intuitive analysis of the effects of these variables. The results show that the impact of air velocity on R1 and R2 is exceptionally significant, and the interaction of each factor on the response value is analyzed. The response value and the quadratic polynomial regression equation between the various factors are obtained in addition to the flow characteristics of stiff shotcrete under different working conditions. The relationship established by the statistical processing of the experimental results can provide some reference for specifying the pressure loss model of stiff shotcrete.

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Section: Introductionmentioning

confidence: 99%