Effect of Inlet Pressure on the Polyurethane Spray Nozzle for Soil Cracking Improvement: Simulations using CFD Method

Q2 Mathematics

CFD Letters Pub Date : 2024-07-21 DOI:10.37934/cfdl.16.12.5971

Tasnim Zakepeli, Nik Normunira Mat Hassan, Nur Afzanizam Samiran, Anika Zafiah Mohd Rus, Noraini Marsi, Tuan Noor Hasanah Tuan Ismail, Mohd Ridzuan Mohd Jamir, Siti Nur Azila Khalid, Muhamad Iqbal Aiman Mohd Azman

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引用次数: 0

Abstract

Rigid spray polyurethane (RSPU) was commercially used as an injection in crack walls or soil surfaces to enhance material performance, increase lifetime, and save operating costs. The limitation of the RSPU nozzle was reported as easily clogging when sprayed out to the insulation and crack surface area and the finished product was less aesthetically pleasing. In this study, the RSPU nozzle of flat fan nozzle, 180° angle (Design A), Hollow cone nozzle, 60° angle (Design B), and Full cone nozzle, 90° angle (Design C) were prepared by using the SOLIDWORKS software. The effect of different pressures for RSPU nozzle design at the ranges of 4Mpa, 5MPa, and 6MPa was examined by ANSYS FLUENT software. The velocity of the outer spray nozzle shows a significant increase with increasing inlet pressure of the RSPU nozzle. The results reveal that the highest velocity of RSPU was obtained at the Hollow cone nozzle (Design B) as compared to (Flat fan nozzle) Design A and (Full cone nozzle) Design C at 394.249 m/s at 4MPa, 442.327 m/s at 5MPa and 485.37 m/s at 6MPa, respectively. The distribution droplet area shows the Design B spray formation had wider area coverage at 60° and exhibited that the injection nozzle spray was scatted and uniform at 6MPa. RSPU shows the velocity increased, distribution droplet increased, and output volume spray was decreased at the increasing of injection pressure. Hence, in this study was suggested that the size of RSPU nozzle design must be made at the ranges of 60° to 90° of outlet nozzle to obtain a good RSPU area. In conclusion, design B is the most effective for RSPU nozzle and is useful in injection cracking and insulation materials applications.

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入口压力对用于改善土壤裂缝的聚氨酯喷嘴的影响：使用 CFD 方法进行模拟

硬质喷涂聚氨酯（RSPU）在商业上被用作裂缝墙或土壤表面的喷射材料，以提高材料性能、延长使用寿命并节省运营成本。据报道，RSPU 喷嘴在喷射到隔热层和裂缝表面区域时容易堵塞，而且成品不太美观。本研究使用 SOLIDWORKS 软件制备了 180° 角的扁平扇形喷嘴（设计 A）、60° 角的空心锥形喷嘴（设计 B）和 90° 角的全锥形喷嘴（设计 C）。ANSYS FLUENT 软件研究了 4MPa、5MPa 和 6MPa 范围内不同压力对 RSPU 喷嘴设计的影响。外喷嘴的速度随着 RSPU 喷嘴入口压力的增加而显著增加。结果显示，与设计 A（平扇形喷嘴）和设计 C（全锥形喷嘴）相比，空心锥形喷嘴（设计 B）获得的 RSPU 速度最高，分别为 4MPa 时 394.249 m/s、5MPa 时 442.327 m/s 和 6MPa 时 485.37 m/s。液滴面积分布显示，在 60° 时，设计 B 形成的喷雾覆盖面积更大，在 6MPa 时，喷射喷嘴的喷雾呈散射状且均匀。RSPU 表明，随着喷射压力的增加，速度增加，分布液滴增加，输出喷雾量减少。因此，本研究建议 RSPU 喷嘴的设计尺寸必须在喷嘴出口 60° 至 90° 的范围内，以获得良好的 RSPU 面积。总之，设计 B 是最有效的 RSPU 喷嘴，可用于注塑开裂和绝缘材料应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

CFD Letters Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

3.40

自引率

0.00%

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