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Journal articles on the topic 'Ceiling jet'

Author: Grafiati

Published: 11 September 2021

Last updated: 17 July 2025

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1

Cooper, L. Y. "Heat Transfer in Compartment Fires Near Regions of Ceiling-Jet Impingement on a Wall." Journal of Heat Transfer 111, no. 2 (1989): 455–60. http://dx.doi.org/10.1115/1.3250698.

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The problem of heat transfer to walls from fire-plume-driven ceiling jets during compartment fires is introduced. Estimates are obtained for the mass, momentum, and enthalpy flux of the ceiling jet immediately upstream of the ceiling–wall junction. An analogy is drawn between the flow dynamics and heat transfer at ceiling-jet/wall impingement and at the line impingement of a wall and a two-dimensional, plane, free jet. Using the analogy, results from the literature on plane, free-jet flows and corresponding wall-stagnation heat transfer rates are recast into a ceiling-jet/wall-impingement-prob

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2

Cooper, L. Y., and A. Woodhouse. "The Buoyant Plume-Driven Adiabatic Ceiling Temperature Revisited." Journal of Heat Transfer 108, no. 4 (1986): 822–26. http://dx.doi.org/10.1115/1.3247018.

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In previous works, convective heat transfer from buoyant plume-driven ceiling jets to unconfined ceilings has been estimated using a formula for the temperature distribution below an adiabatic ceiling Tad obtained from experimental data in the range 0 ≤ r/H < 0.7 (r is the radial distance from the plume and H is the plume source-to-ceiling distance). The present study re-evaluates these data, and develops an independent estimate for Tad. The analysis takes account of the effect of ceiling surface reradiation, and use is made of the previously established similarity between plume/ceiling- an

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3

Cooper, L. Y., and D. W. Stroup. "Thermal Response of Unconfined Ceilings Above Growing Fires and the Importance of Convective Heat Transfer." Journal of Heat Transfer 109, no. 1 (1987): 172–78. http://dx.doi.org/10.1115/1.3248040.

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A procedure is developed to calculate the thermal response of unconfined nonburning ceilings above growing fires. The procedure uses an algorithm for conduction into the ceiling material. It takes account of heat transfer due to radiation from the combustion zone to the ceiling surface, and due to reradiation from the ceiling to the floor and furnishings. Finally, the procedure uses a previously developed algorithm for convective heat transfer to the ceiling from the fire-plume-driven ceiling jet. The procedure is used to predict radial-dependent surface temperature histories of typical ceilin

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4

Kwack, E. Y., C. P. Bankston, P. Shakkottai, and L. H. Back. "On the Reverse Flow Ceiling Jet in Pool Fire-Ventilation Crossflow Interactions in a Simulated Aircraft Cabin Interior." Journal of Heat Transfer 113, no. 2 (1991): 446–50. http://dx.doi.org/10.1115/1.2910581.

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The behavior of the reverse flow ceiling jet against the ventilation flow from 0.58 to 0.87 m/s was investigated in a 1/3 scale model of a wide body aircraft interior. For all tests, strong reverse flow ceiling jets of hot gases were detected well upstream of the fire. The penetration lengths of the reverse flow ceiling jet for the tests agree fairly well with the relation, lr/H = 0.6 [F−5] where F is the fire-crossflow parameter, F = 2gHQ˙/ρcTsAua3. Both the thicknesses of the reverse flow ceiling jet and the smoke layer increased with the fire-crossflow parameter. The thickness of the smoke

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5

Kim, Yun-Seong, Young-Jin Kwon, Hyun Kang, and Oh-Sang Kweon. "Analysis of Temperature Decrease in Ceiling Jets Flowing Along Horizontal Corridors." Fire Science and Engineering 39, no. 3 (2025): 1–11. https://doi.org/10.7731/kifse.97ac7884.

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This study analyzed the temperature attenuation characteristics of ceiling jets flowing along ceilings in corridor spaces. Full-scale fire experiments were performed using ethanol in a steel-constructed corridor measuring 5 m (W) × 25 m (L) × 5 m (H). The experimental variables were ceiling height and heat release rate. The results indicated that the transition point from turbulent to laminar flow in the ceiling jet was governed by the ceiling height. Based on a review of experimental results obtained in previous studies using correlation equations derived from the conservation laws, a set of

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6

Emmons, H. "The Ceiling Jet In Fires." Fire Safety Science 3 (1991): 249–60. http://dx.doi.org/10.3801/iafss.fss.3-249.

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7

Tao, Haowen, Zhisheng Xu, and Dongmei Zhou. "Investigation of the Temperature Beneath Curved Tunnel Ceilings Induced by Fires with Natural Ventilation." Fire 5, no. 4 (2022): 90. http://dx.doi.org/10.3390/fire5040090.

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The distribution characteristics of the temperature below ceilings in curved tunnel fires have not been quantitatively studied. A small-scale tunnel was constructed in this work to study the maximum temperature and longitudinal attenuation of the temperature below ceilings induced by fires in a curved tunnel with natural ventilation. Different tunnel turning radiuses and fire heat release rates were taken into account. The results show that the distribution characteristics of temperature below the tunnel ceiling is hardly affected by the tunnel turning radius in a scenario where the flame plum

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8

Kim, Yunseong, Youngjin Kwon, Hyewon Kim, Hyun Kang, and Ohsang Kweon. "Analysis of the Temperature Characteristics of Ceiling Jets in Large Corridor Spaces." Journal of the Korean Society of Hazard Mitigation 24, no. 6 (2024): 193–201. https://doi.org/10.9798/kosham.2024.24.6.193.

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In this study, the temperature characteristics of a ceiling jet flowing through a ceiling in the event of a fire in a large corridor space were experimentally analyzed to show consistency with the equation shown through the energy conservation equations. The experimental results show that the horizontal temperature distribution of the ceiling jet decreases sharply until the dimensionless distance (r/z) is 0.2, and the vertical temperature distribution increases from a dimensionless height z/H of 0.5. In addition, the consistency between the energy-conservation-law-based prediction formula and

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9

Oka, Yasushi, and Ken Matsuyama. "Scale similarity on ceiling jet flow." Fire Safety Journal 61 (October 2013): 289–97. http://dx.doi.org/10.1016/j.firesaf.2013.09.020.

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10

Motevalli, Vahid, and Zheng P. Yuan. "Steady State Ceiling Jet Behavior under an Unconfined Ceiling with Beams." Fire Technology 44, no. 2 (2007): 97–112. http://dx.doi.org/10.1007/s10694-007-0027-3.

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11

Oka, Yasushi, Osamu Imazeki, and Osami Sugawa. "Temperature profile of ceiling jet flow along an inclined unconfined ceiling." Fire Safety Journal 45, no. 4 (2010): 221–27. http://dx.doi.org/10.1016/j.firesaf.2010.03.003.

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12

Koslowski, C., and V. Motevalli. "Behavior Of A 2-dimensional Ceiling Jet Flow: A Beamed Ceiling Configuration." Fire Safety Science 4 (1994): 469–80. http://dx.doi.org/10.3801/iafss.fss.4-469.

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13

Kuromiya, Yusuke, Satoshi Ashizawa, Daiki Ando, and Takeo Oomichi. "Development of the Real-Time Position Detection Sensor for the Small Projected Objects." Journal of Robotics and Mechatronics 24, no. 1 (2012): 244–53. http://dx.doi.org/10.20965/jrm.2012.p0244.

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The ceiling dismantling robot that we developed cuts ceiling boards with a high-pressure water-jet cutter. The cutting operation of the ceiling board is done below the Light-Gauge Steel (LGS) attached to ceiling boards with screws. A magnetic sensor that detects LGS was developed for this robot system. The robot can dismantle ceiling boards because of a successful mock-up experiment. This paper describes the method of screw detection that targets saving water and reducing dust. There are several problems, for example, increased noise and detecting objects as early as possible. The validity of

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14

Oka, Y., M. Ando, and K. Kamiya. "Ceiling Jet Flow Property in the Case of Flame Touching an Inclined Ceiling." Fire Safety Science 10 (2011): 471–82. http://dx.doi.org/10.3801/iafss.fss.10-471.

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15

Guo, Lanxia, Huijuan Zhang, Jinlan Tan, and Tao Huang. "Indoor air distribution simulation of Perforated Ceiling Air Supply in summer." Advances in Engineering Technology Research 6, no. 1 (2023): 258. http://dx.doi.org/10.56028/aetr.6.1.258.2023.

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In this paper，the Airpak is used to modeling and numerical calculation traditional jet air supply and three conditions of perforated ceiling air supply，by contrast with the indoor temperature profile, velocity profile and PMV-PPD distribution,comprehensive analysis of indoor air distribution and thermal comfort.The results showed that：Compared with traditional jet air supply，perforated ceiling air supply with low speed and balanced ventilation might alleviate blowing sensation to indoor personnel，has a significant effect on the improvement of indoor air distribution and thermal comfort;Further

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16

Kim, Yunseong, Youngjin Kwon, Hyun Kang, and Ohsang Kweon. "Comparative Study of Temperature Distribution Characteristics of Ceiling Jets at Center and Edge Regions in Corridors." Fire 8, no. 5 (2025): 181. https://doi.org/10.3390/fire8050181.

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This study analyzed the temperature characteristics of ceiling jets in corridor spaces by conducting experiments with varying heat release rates and ceiling heights and comparing the results with predictive equations based on the energy conservation equation. The smoke layer formed at a lower height than in open spaces, and the ceiling jet temperature near the wall was higher than that along the central axis. Predictions were generally accurate at a ceiling height of 3.0 m but were overestimated at 1.5 m and underestimated at 4.5 m. The temperature attenuation trend aligned with Oka’s equation

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17

COOPER, LEONARD Y. "Ceiling Jet-Driven Wall Flows in Compartment Fires." Combustion Science and Technology 62, no. 4-6 (1988): 285–96. http://dx.doi.org/10.1080/00102208808924014.

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18

Suzuki, Keichi. "Unsteady ceiling jet model for large building spaces." Fire Safety Journal 61 (October 2013): 83–91. http://dx.doi.org/10.1016/j.firesaf.2013.08.007.

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19

Vafai, K., and A. J. Lacalle. "Transient ceiling jet development in large scale fires." International Communications in Heat and Mass Transfer 16, no. 4 (1989): 513–23. http://dx.doi.org/10.1016/0735-1933(89)90055-9.

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20

Oka, Yasushi, and Masaki Ando. "Temperature and velocity properties of a ceiling jet impinging on an unconfined inclined ceiling." Fire Safety Journal 55 (January 2013): 97–105. http://dx.doi.org/10.1016/j.firesaf.2012.10.019.

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21

Oka, Yasushi, Aoi Tanno, Chiaki Iwamoto, Yoshiki Sakurai, and Hideyuki Oka. "Semi-Empirical Model of Ceiling Jet in Tranquil Flow Region in Arched Ceiling Tunnel." International Journal of Fire Science and Engineering 39, no. 2 (2025): 31–47. https://doi.org/10.7731/kifse.95ed4fd.

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The present study focuses on the temperature and velocity of the smoke layer in the tranquil flow region of a naturally ventilated tunnel with an arched ceiling. Fire experiments were conducted using a laboratory-scale model tunnel with a height of 0.275 m, a floor width of 0.41 m and a length of 10 m. To predict the temperature at arbitrary positions within the tranquil flow region, the temperature attenuation equation, expressed as a weighted average of two exponential functions, is presented. A semi-empirical prediction formula is proposed to estimate the velocity attenuation of the smoke l

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22

Zhuang, Zhaoyi, Chaoqun Lv, Xiu Yang, Wenzeng Shen, Wei Shao, and Chuntian Zhang. "Analysis of Indoor Thermal and Humidity Environment of Radiant Cooling Coupled with Attached Jet System." E3S Web of Conferences 356 (2022): 03031. http://dx.doi.org/10.1051/e3sconf/202235603031.

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The radiant cooling combined with attached jet air supply system is a temperature and humidity independent control system. Radiant cooling panels are used to bear the indoor sensible heat load, and the attached jet air supply is used to bear the indoor humidity load. Numerical simulation method is used to study the changes of indoor relative humidity and dehumidification efficiency of radiant cooling panels installed on ceiling and wall, as well as the advantages and disadvantages of all three systems taking into consideration the radiant cooling coupled with wall attached jet air supply with

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23

Oka, Yasushi, Hideyuki Oka, and Osamu Imazeki. "Ceiling-jet thickness and vertical distribution along flat-ceilinged horizontal tunnel with natural ventilation." Tunnelling and Underground Space Technology 53 (March 2016): 68–77. http://dx.doi.org/10.1016/j.tust.2015.12.019.

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24

Huang, Xubo, Yongfeng Zhang, Wei Wang, and Zhenxiang Tao. "Longitudinal Ceiling Temperature Profile in an Inclined Channel Induced by a Wall-Attached Fire." Fire 8, no. 6 (2025): 222. https://doi.org/10.3390/fire8060222.

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Channel fire poses a great threat to personnel safety and structural strength, in which the temperature profile is worthy of attention. In this paper, the longitudinal temperature profile of a ceiling jet induced by a wall-attached fire with different channel slopes was experimentally investigated using a 1:8 reduced-scale channel. The results show the following: (1) For channel fire with a horizontal ceiling, the influence of the burner aspect ratio and source-ceiling height on the temperature profile is monotonous in the cases considered in this work. With a larger burner aspect ratio and la

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25

Yao, X., and A. Marshall. "Characterizing Turbulent Ceiling Jet Dynamics With Salt-water Modeling." Fire Safety Science 8 (2005): 927–38. http://dx.doi.org/10.3801/iafss.fss.8-927.

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26

Ju, Hyeon-Don. "Analysis of Transient Ceiling Jet Waves in a Corridor." Journal of Korean Society of Hazard Mitigation 11, no. 6 (2011): 149–56. http://dx.doi.org/10.9798/kosham.2011.11.6.149.

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27

Oka, Yasushi, Norichika Kakae, Osamu Imazeki, and Kosuke Inagaki. "Temperature Property of Ceiling Jet in an Inclined Tunnel." Procedia Engineering 62 (2013): 234–41. http://dx.doi.org/10.1016/j.proeng.2013.08.060.

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28

Zhang, Shenghao, and Na Meng. "A Study on the Maximum Temperature of a Ceiling Jet of Asymmetric Dual Strong Plumes in a Naturally Ventilated Tunnel." Fire 7, no. 4 (2024): 110. http://dx.doi.org/10.3390/fire7040110.

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This paper explores the temperature distribution (TD) and maximum temperature (MT) below the ceiling induced by the ceiling jet of an asymmetric dual fire sources in a naturally ventilated tunnel. Considering strong plumes, this study investigates the effects of fire size and spacing of asymmetric dual fire sources on TD and MT. With the same power of fire source, when the size of one of the fire sources increases, the corresponding maximum temperature beneath ceiling decreases. Additionally, the temperature peak below the ceiling shifts from one to two, and the peak temperature of the larger

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29

Hussein, Harem, Síle Brennan, and Vladimir Molkov. "Hydrogen Jet Fire from a Thermally Activated Pressure Relief Device (TPRD) from Onboard Storage in a Naturally Ventilated Covered Car Park." Hydrogen 2, no. 3 (2021): 343–61. http://dx.doi.org/10.3390/hydrogen2030018.

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Hydrogen jet fires from a thermally activated pressure relief device (TPRD) on onboard storage are considered for a vehicle in a naturally ventilated covered car park. Computational Fluid Dynamics was used to predict behaviour of ignited releases from a 70 MPa tank into a naturally ventilated covered car park. Releases through TPRD diameters 3.34, 2 and 0.5 mm were studied to understand effect on hazard distances from the vehicle. A vertical release, and downward releases at 0°, 30° and 45° for TPRD diameters 2 and 0.5 mm were considered, accounting for tank blowdown. direction of a downward r

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30

Ishihara, Takahiro, Hiroyuki Sunahara, Akimitsu Kikkawa, Masayuki Mizuno, Yoshifumi Ohmiya, and Masahiro Morita. "Fire Behavior under a Ceiling in Growing Fire Part 2 Ceiling Jet Velocity and Flame Length." Fire Science and Technology 26, no. 4 (2007): 479–83. http://dx.doi.org/10.3210/fst.26.479.

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31

You, H. Z. "An investigation of fire-plume impingement on a horizontal ceiling. 2?Impingement and ceiling-jet regions." Fire and Materials 9, no. 1 (1985): 46–56. http://dx.doi.org/10.1002/fam.810090108.

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32

Jadhav, H. T., and S. J. Hoff. "Use of Air Infiltration in Swine Housing Ventilation System Design." Applied Engineering in Agriculture 35, no. 3 (2019): 325–38. http://dx.doi.org/10.13031/aea.12965.

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Abstract.The objective of this research was to develop and analyze the procedure for using recent air infiltration (AI) data collected from commercial swine finishing rooms (SFRs) in the design of negative pressure mechanical ventilation systems (VSs). Air infiltration is an integral part of any ventilation process. Infiltration reduces the pressure differential across planned inlets and at very low pressure differences, cold air jets may drop directly on the animals causing significant discomfort. In this article, a design procedure is proposed for swine housing ventilation systems with the i

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33

Watanabe, Jun-ichi, and Takeyoshi Tanaka. "Prediction of Ceiling Jet Smoke Concentration under Two Layer Environment." Fire Science and Technology 24, no. 3 (2005): 151–64. http://dx.doi.org/10.3210/fst.24.151.

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34

Neal E. Blackwell, David H. Vaughan, and Gerald R. Baughman. "Wall Jet Model for Ceiling Fan Applications in Broiler Houses." Transactions of the ASAE 32, no. 1 (1989): 0232–40. http://dx.doi.org/10.13031/2013.30988.

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35

Huo, Y., Y. Gao, and W. K. Chow. "A study on ceiling jet characteristics in an inclined tunnel." Tunnelling and Underground Space Technology 50 (August 2015): 32–46. http://dx.doi.org/10.1016/j.tust.2015.06.009.

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36

Jothi S, Siva. "Design Project of Eight Seater Short Range Business Jet Aircraft (Cessna Citation CJ3+)." International Scientific Journal of Engineering and Management 04, no. 05 (2025): 1–7. https://doi.org/10.55041/isjem03410.

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Abstract - This project explores the design and development of an eight-seat short-range business jet, aiming to optimize performance, passenger comfort, and operational efficiency for regional travel. With a targeted range of 2,500 nautical miles, the proposed aircraft is intended to facilitate quick and convenient transportation between major urban centers. The design features a modern seating arrangement that ensures passenger comfort and privacy, along with advanced amenities that enhance the in-flight experience. The aircraft will be powered by twin turbofan engines, allowing it to cruise

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37

NITTA, Kotaro, Jun-ichi YAMAGUCHI, Yasushi OKA, and Ko MURAOKA. "AN EXPERIMENTAL STUDY ON PREDICTING METHOD OF FIRE LOCATION BASED ON CEILING JET TEMPERATURE UNDER UNCONFINED CEILING." Journal of Environmental Engineering (Transactions of AIJ) 72, no. 615 (2007): 1–8. http://dx.doi.org/10.3130/aije.72.1_5.

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38

Tang, Fei, Zhilei Cao, Zhen He, Xiang Ling, and Qiang Wang. "Thermal plume temperature profile of buoyancy-driven ceiling jet in a channel fire using ceiling smoke extraction." Tunnelling and Underground Space Technology 78 (August 2018): 215–21. http://dx.doi.org/10.1016/j.tust.2018.04.028.

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39

Oka, Yasushi, and Osamu Imazeki. "Temperature distribution within a ceiling jet propagating in an inclined flat-ceilinged tunnel with natural ventilation." Fire Safety Journal 71 (January 2015): 20–33. http://dx.doi.org/10.1016/j.firesaf.2014.11.002.

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40

Oka, Yasushi, and Hideyuki Oka. "Temperature and velocity distributions of a ceiling-jet along a flat-ceilinged tunnel with natural ventilation." Fire Safety Journal 112 (March 2020): 102969. http://dx.doi.org/10.1016/j.firesaf.2020.102969.

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41

Hossain, Dalower, and Daniel Kashetu Alasa. "Numerical Modeling of Fire Growth and Smoke Propagation in Enclosure." Journal of Management World 2024, no. 5 (2024): 186–96. https://doi.org/10.53935/jomw.v2024i4.1051.

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In this study, fire growth and smoke propagation in enclosures are numerically modeled based on the material properties, ventilation and the enclosure geometry of similar geometries. Thing such as combustible materials, ventilation openings, and ceiling height affect the fire behavior. This research employs the Fire Dynamics Simulator (FDS) to study the influence of the ventilation conditions on the ceiling jet phenomenon, heat release rates (HRR) and smoke movement. Its high flammability is analyzed, as polyurethane foam is a key material in the development of fire. The results show that vent

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42

Wang, Huan, Maohui Luo, Guijin Wang, and Xianting Li. "Airflow pattern induced by ceiling fan under different rotation speeds and blowing directions." Indoor and Built Environment 29, no. 10 (2019): 1425–40. http://dx.doi.org/10.1177/1420326x19890054.

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Ceiling fans have been widely used as effective cooling and air mixing method for building environment conditioning. Understanding its airflow characteristics can be helpful to utilize ceiling fan or integrate it with background air conditioning system. However, the airflow induced by ceiling fan has different flow patterns under different rotating speeds and blowing directions. To date, it is still challenging to capture those complicated airflow fields in room scale. In this study, the airflow pattern induced by a ceiling fan was measured with a new technology, quad-view colour sequence part

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43

Li, Linjie, Wuchao Zhang, Zihe Gao, and Liangwen Wei. "Experimental study on the flame merging and ceiling impingement behavior of transversely located double fire sources in an urban utility tunnel." Indoor and Built Environment 32, no. 1 (2023): 286–95. http://dx.doi.org/10.1177/1420326x221147427.

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The investigation of the fire characteristics and propagation behaviour in the urban utility tunnel is of great practical importance, especially for the conditions with double fire sources. In this work, a 1/8th scaled urban utility tunnel model was built to conduct the experiments to characterize the flame merging and ceiling impingement behaviour of transversely located double fire sources. Two rectangular fire sources with the same dimension were used, and their heat release rate (HRR) and fire source spacings were varied to consider the typical scenarios. Results show that for the smaller

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44

Oka, Yasushi, and Osamu Imazeki. "Temperature and velocity distributions of a ceiling jet along an inclined ceiling – Part 1: Approximation with exponential function." Fire Safety Journal 65 (April 2014): 41–52. http://dx.doi.org/10.1016/j.firesaf.2013.07.009.

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45

Pan, Rongliang, and Guoqing Zhu. "Multi-dimensional investigation of ceiling jet temperature characteristics beneath curved ceiling produced by fire in the utility tunnel." Fire Safety Journal 146 (June 2024): 104143. http://dx.doi.org/10.1016/j.firesaf.2024.104143.

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46

Hurnik, Maria, Jan Kaczmarczyk, and Zbigniew Popiolek. "Study of Radial Wall Jets from Ceiling Diffusers at Variable Air Volume." Energies 14, no. 1 (2021): 240. http://dx.doi.org/10.3390/en14010240.

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The knowledge of the air velocity distribution in the supply jets is essential when designing ventilation and air conditioning systems. In this study, we tested and analyzed the velocity distributions in the radial wall jets—these jets are commonly used in ventilated rooms. Tests included jets from two ceiling diffusers of different constructions, at three airflow rates. The mean air speed distributions were measured with a 16-channel hot-sphere anemometer both in the self-similarity zone and in the terminal zone. A specially developed method of converting the mean speed to mean velocity was u

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47

SUZUKI, Keichi. "EXTENDING OF CEILING JET MODEL TO UNSTEADY CASES IN LARGE SPACES." Journal of Environmental Engineering (Transactions of AIJ) 77, no. 674 (2012): 223–30. http://dx.doi.org/10.3130/aije.77.223.

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48

Motevalli, V., and C. Marks. "Characterizing The Unconfined Ceiling Jet Under Steady-state Conditions: A Reassessment." Fire Safety Science 3 (1991): 301–12. http://dx.doi.org/10.3801/iafss.fss.3-301.

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49

Saito, Sanetoshi, and Yuki Yamauchi. "Theoretical analysis of heat loss from ceiling jet in tunnel fires." Tunnelling and Underground Space Technology 110 (April 2021): 103811. http://dx.doi.org/10.1016/j.tust.2021.103811.

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50

Hu, L. H., R. Huo, Y. Z. Li, et al. "Tracking a Ceiling Jet Front for Hot Smoke Tests in Tunnels." Journal of Fire Sciences 25, no. 2 (2007): 99–108. http://dx.doi.org/10.1177/0734904107065888.

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