Simulation Study of Nozzle in Fire Engine Based on Fluent

2013 ◽  
Vol 318 ◽  
pp. 231-234
Author(s):  
Dong Hai Su ◽  
Hao Jing ◽  
Yue Ling Wang

Focus on the technology and requirements of nozzle in fire engine to optimize the ability of blasting of nozzle, this paper built the model of fluid in nozzle, and simulation studied based on Fluent. This paper analysis the stage of nozzle, contraction angle, size of entrance and slenderness ratio as the influencing factors, supplied the reliable theoretical foundation for the design and structural improvement of nozzle in fire engine.

2021 ◽  
Vol 197 ◽  
pp. 111138
Author(s):  
Changsheng Jin ◽  
Zhongwu Li ◽  
Mei Huang ◽  
Jiajun Wen ◽  
Xiang Ding ◽  
...  

2018 ◽  
Vol 4 (4) ◽  
pp. 712 ◽  
Author(s):  
Abdelraouf Tawfik Kassem

Reinforced concrete slabs are elements in direct contact with superimposed loads, having high surface area and small thickness. Such a condition makes slabs highly vulnerable to fire conditions. Fire results in exaggerated deformations in reinforced concrete slabs, as a result of material deterioration and thermal induced stresses. The main objective of this paper is to deeply investigate how circular R.C. slabs, of different configurations, behave in fire condition. That objective has been achieved through finite element modelling. Thermal-structural finite element models have been prepared, using "Ansys". Finite element models used solid elements to model both thermal and structural slab behaviour. Structural loads had been applied, representing slab operational loads, then thermal loads were applied in accordance with ISO 843 fire curve. Outputs in the form of deflection profile and edge rotation have been extracted out of the models to present slab deformations. A parametric study has been conducted to figure out the significance of various parameters such as; slab depth, slenderness ratio, load ratio, and opening size; regarding slab deformations. It was found that deformational behaviour differs significantly for slabs of thickness equal or below 100 mm, than slabs of thickness equal or above 200 mm. On the other hand considerable changes in slabs behaviour take place after 30 minutes of fire exposure for slabs of thickness equals or below 100 mm, while such changes delay till 60 minutes for slabs of thickness equals or above 200 mm.


2018 ◽  
Vol 45 (3) ◽  
pp. 491-498 ◽  
Author(s):  
Qiu LI ◽  
Leihao YI ◽  
Junshi TANG ◽  
Wenlong GUAN ◽  
Youwei JIANG ◽  
...  
Keyword(s):  

2010 ◽  
Vol 44-47 ◽  
pp. 1320-1324
Author(s):  
Lan Ting Zhang ◽  
Hai Qing Cheng ◽  
Li Ming Song ◽  
Jin Shun Yan

Based on the thrust regulating principle of pintle controlled solid-rocket engine, the mathematical model between pintle motion and thrust changing is established, and influence of main factors to thrust regulating effect is analyzed. These results can provide theoretical foundation for structure design and control of pintle controlled thrust regulating mechanism of solid-rocket engine.


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