| Title |
Analysis of Pressure Loss Effect by Groove of Road Tunnel Fire Piping Using Grooved Joint |
| Authors |
Byeong Guk Kim ; Hyun Jung Kim |
| DOI |
https://doi.org/10.6110/KJACR.2024.36.9.466 |
| Keywords |
등가길이; 그루브; 그루브조인트; 압력손실; 도로터널 소화배관 Equivalent length; Groove; Grooved joint; Pressure loss; Road tunnel fire piping |
| Abstract |
Various methods exist for joining fire pipes. This study investigated the pressure loss caused by grooves in the pipe using the grooved joint bonding method. The groove size was very small, and the equivalent length presented by each design workbook was different, making it difficult to design. Particularly, fire extinguishing facilities in systems with many grooves compared to other facilities, such as tunnel fire extinguishing facilities, are expected to vary greatly. As the uneven part is fine, the actual measurement experiment is difficult, so it was analyzed using numerical analysis. A sudden change in pressure caused by the expansion and reduction of the groove and pressure loss caused by a recirculation vortex in the expansion part occurred. The grooved joint pressure loss equivalent length at 100A was 0.225 m, 125A was 0.333 m, 150A was 0.305 m, 200A was 0.285 m, 250A was 0.276 m, and 300A was 0.330 m, for an average equivalent length of 0.292 m. |