2007
DOI: 10.1016/j.buildenv.2005.12.004
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Scale model study of airflow performance in a ceiling slot-ventilated enclosure: Non-isothermal condition

Abstract: Scale-model study of a non-isothermal ceiling slot-ventilated enclosure was investigated in both airspeed and thermal fields. Results of airflow pattern, centerline velocity and centerline temperature decay, velocity and temperature profile, airflow boundary layer and thermal boundary layer growth, floor velocity, and floor temperature difference were analyzed to establish semi-empirical prediction equations. Results also compared with previous researches to validate the physical behavior of air-jet. Data of c… Show more

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Cited by 34 publications
(14 citation statements)
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“…As defined in [6][7], if the relative influence of momentum and buoyancy are used as the critical criteria to classify the flow regions, the nonbuoyancy region refers to the situation in which momentum dominates the jet behavior. Then the jet behaves like a plume rather than a jet with a certain structure.…”
Section: Self Similarity Of the Buoyant Jetmentioning
confidence: 99%
See 1 more Smart Citation
“…As defined in [6][7], if the relative influence of momentum and buoyancy are used as the critical criteria to classify the flow regions, the nonbuoyancy region refers to the situation in which momentum dominates the jet behavior. Then the jet behaves like a plume rather than a jet with a certain structure.…”
Section: Self Similarity Of the Buoyant Jetmentioning
confidence: 99%
“…However, non-isothermal conditions pose a challenging problem in the prediction of the buoyant attached jet behavior. One of the attached jet applications in rooms is the active chilled beam which enables a plane jet discharging on the ceiling so that the highvelocity region is restricted to the ceiling, thus possibly freeing the occupied zone from draught [5][6]. Under normal design conditions, the jet stays attached to the ceiling until the opposite wall is reached, when it is then deflected downwards into the wall-floor zone.…”
Section: Introductionmentioning
confidence: 99%
“…The diffuser throw was found to be linearly related to the Archimedes number, which represents the ratio of buoyancy to inertial force exerted on the fluid. Yu et al (2007) studied airflow in a ceiling slot-ventilated enclosure in a 1:3 scale model. They measured the velocity and temperature profiles, temperature decays, and thermal boundary layers.…”
Section: Introductionmentioning
confidence: 99%
“…For avoiding perturbations in the flow two pressure regulators in the inlet and outlet were set. Laser Doppler anemometry (LDA) method and particle image velocity (PIV) were used to register fluid flow movements A 1/3 scale model of a prototype building was used to study airflow performance in a confined enclosure [258]. The dimensions of the scale model were 1.8 m × 2.4 m × 0.9 m.…”
Section: Ventilation For Buildings Using Scale Modelsmentioning
confidence: 99%