Experimental Investigation on the Mass Loss Rates of Thin-Layered n-Heptane Pool Fires in Longitudinally Ventilated Reduced Scale Tunnel

Date

2017-01-01

Author

Shafee, Sina
Yamali, Uluc
Yozgatlıgil, Ahmet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

200
views

0
downloads

Thin-layered n-heptane pool fires are burned with varied pool depths under longitudinal ventilation velocities ranging between 0.5-2.5 m/s in a reduced scale tunnel model. The combined effects of ventilation, pool size, and depth are investigated on the heat release rate, temperature distribution, and mass loss rate of fire. The gas temperature distribution and heat release rate results indicate that the critical ventilation velocity is achieved around 1 m/s in the scaled model, corresponding to 3.6 m/s in the real scale tunnel. It is observed that the gas temperature downstream of the fire increases at 2.5 m/s ventilation due to an enhancing effect of oxygen supply to the fire and increased flame deflection towards the leeward side of the pan. Results show that maximum heat release rate and total heat release normalized by fuel amount tend to occur at critical ventilation velocity. The measured mass loss rates show a considerable increasing trend with pool depth.

Subject Keywords

Critical ventilation velocity, Thin-layered pool fire, Mass loss rate, Heat release rate

URI

https://hdl.handle.net/11511/33337

Journal

COMBUSTION SCIENCE AND TECHNOLOGY

DOI

https://doi.org/10.1080/00102202.2017.1338693

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

An experimental study on the effects of blockage ratio and ventilation velocity on the heat release rate of tunnel fires Kayili, Serkan; Yozgatlıgil, Ahmet; Cahit Eralp, O. (SAGE Publications, 2011-8-26) It is very important to accurately predict the fire-induced air velocity, temperature, and smoke concentrations in tunnel fires to design efficient fire protection systems. In this study a scaled model of a tunnel was constructed based on Froude number scaling and wood sticks with different configurations which were burned in a controlled environment. Model vehicles having a square base were built according to the wood crib theory. The impact of varying longitudinal ventilation velocity and the cross-sectio...
Performance improvement of seismic-isolated bridges near active faults using elastic-gap devices Dicleli, Murat (2017-04-27) For seismic isolated bridges (SIBs) subjected to near-fault (NF) ground motions with directivity effect, the isolator displacements tend to be considerably large. Consequently, isolators with very large dimensions may be required for SIBs located in NF zones. This may lead to very large expansion joints and very large seat widths as well. In this research, the efficiency of providing supplemental elastic-gap devices to improve the performance of seismic-isolated bridges (SIBs) in near-fault (NF) zones is in...
EXPERIMENTAL INVESTIGATION OF HEAT TRANSFER AND PRESSURE DROP OVER RECTANGULAR PROFILE FINS PLACED IN A SQUARE CHANNEL Aylı, Ece; Kıyıcı, Fırat; Bayer, Özgür; ARADAĞ ÇELEBİOĞLU, SELİN (2014-06-19) In this study, with the help of a fan, fully developed turbulent flow conditions are experimentally obtained to investigate the heat transfer and pressure drop characteristics of rectangular fins. Fins with different geometries are placed to the bottom surface of a square shaped channel. Finned test pieces are heated by constant heat flux and other parts are kept as well insulated. The effect of fin height to the heat transfer coefficient is investigated by performing experiments. Temperature distributions,...
Dynamic fracture of explosive bolt Gökçe, Batuhan; Dal, Hüsnü; Yıldırım, Raif Orhan; Department of Mechanical Engineering (2018) In this study, dynamic fracture of the pressure type explosive bolt is established with different geometry of the piston, which is used to break the body, to enhance the reliability of the system. Before the fracture analysis of the explosive bolts, pyrotechnic combustion analysis is studied and 0-D ballistic solver is developed to simulate the performance of the initiator into the pyrotechnic, namely pressure type, explosive bolt. By using the developed model, the pressure and temperature in the expansion ...
Experimental investigation of carbon dioxide injection effects on methane-propane-carbon dioxide mixture hydrates Abbasov, Abbas; Merey, Sukru; Parlaktuna, Mahmut (2016-08-01) In this research, first, hydrate with high saturation in porous media (sand sediments) was formed in fully filled high pressure cell by using a mixture of the following gases at 4 degrees C: methane (CH4), propane (C3H8) and carbon dioxide (CO2). The feed mole percent of the gases used was selected as follows: CH4 (95%), C3H8 (3%), CO2 (2%). This selection was made in order to form natural gas hydrate of thermogenic origin (sII type hydrate). Thereafter, CO2 injection into the high saturation hydrate media ...

Citation Formats

S. Shafee, U. Yamali, and A. Yozgatlıgil, “Experimental Investigation on the Mass Loss Rates of Thin-Layered n-Heptane Pool Fires in Longitudinally Ventilated Reduced Scale Tunnel,” COMBUSTION SCIENCE AND TECHNOLOGY, pp. 1907–1923, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33337.