Criterion for Establishing Similar Air Flow Patterns (Isothermal) in Slotted-inlet Ventilated Enclosures

Adre, N.; Albright, L. D.

doi:10.13031/2013.28077

Cited by 28 publications

(51 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…= jet momentum fimction defined by Kaul et al (1975) (kgW-s^) =jet momentum number defined as QU, gV K = turbulent kinetic energy (m /s ) Km, = ratio of maximum velocity at reverse flow to maximum velocity at end wall L = room length (m) Lp = penetration distance defined by Adre and Albright (1994), see Figure 3.4 (m) Lpn = penetration distance defined by Kaul et al (1975), see Future studies including improvement of the evaluation method, more complete investigation of the enclosure, variation of scale dimension and configuration layout, and better control of the experimental environment are recommended.…”

Section: Iqmentioning

confidence: 99%

“…Previous research has shown that Reynolds number (Re), inlet jet momentum number (J), and inlet jet momentum ratio (Rm) can be used as similitude criteria for isothermal conditions with the Archimedes number (Ar) added for nonisothermal airflow (Adre and Albright, 1991). However, these similitude criteria have been proposed as inappropriate in some past research (Zhang, 1991;Adre and Albright, 1994;Liu et al, 1995) and thus more validation work is needed to help clarify this dilemma.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Previous studies (Sigalla, 1958;Myers et al, 1963) concluded that the peak velocity decay of a plane wall jet was similar to the plane free jet. The peak velocity decay in the streamwise direction was caused mainly by entrainment from the surrounding air and was unaffected by the shear (viscous) stress at the wail (Adre and Albright, 1994). The plane wall centerline velocit>' decay was defined as (Adre and Albright, 1994):…”

Section: Centerline Velocity Of Plane Wall Air-jetsmentioning

confidence: 99%

“…The peak velocity decay in the streamwise direction was caused mainly by entrainment from the surrounding air and was unaffected by the shear (viscous) stress at the wail (Adre and Albright, 1994). The plane wall centerline velocit>' decay was defined as (Adre and Albright, 1994):…”

Section: Centerline Velocity Of Plane Wall Air-jetsmentioning

confidence: 99%

See 3 more Smart Citations

Air mixing criteria for ceiling slot-ventilated agricultural enclosures

View full text Add to dashboard Cite

This manuscript has been reproduced from the microfilm master. UMl films the text directly from the ori^al or copy submitted. Thus, some thesis and dissertation copies are in typewriter fece, while others may be from any type of computer printer.The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, begbining at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. Each ori^al is also photographed in one exposure and is included in reduced form at the back of the book.

show abstract

Section: Iqmentioning

confidence: 99%

Section: Numerical Simulationmentioning

confidence: 99%

Section: Centerline Velocity Of Plane Wall Air-jetsmentioning

confidence: 99%

Section: Centerline Velocity Of Plane Wall Air-jetsmentioning

confidence: 99%

See 2 more Smart Citations

Air mixing criteria for ceiling slot-ventilated agricultural enclosures

View full text Add to dashboard Cite

show abstract

“…Air-jet penetration has been used to express airflow patterns quantitatively. Adre and Albright [6] defined air-jet penetration (L p ) as the distance from the inlet wall where the wall jet separated from the ceiling. Kaul et al [7] defined air-jet penetration as the distance from the inlet wall on the floor where the incoming air-jet impinged (L pn ).…”

Section: Airflow Patternmentioning

confidence: 99%

Scale model study of airflow performance in a ceiling slot-ventilated enclosure: Non-isothermal condition

Liao

Liang

et al. 2007

Building and Environment

View full text Add to dashboard Cite

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 centerline velocity decay showed similar airflow characteristics as isothermal air-jet with Archimedes number ðArÞo0:004, which performed as pseudo-isothermal airflow. Air-jet fell on entry with Ar40:018. A single circulation airflow existed at 0:004oAro0:011 and two-circulation airflow occurred at 0:011oAro0:018. The centerline velocity decay was fitted well as similar form of an isothermal condition. The centerline temperature decay was fitted well as the form of centerline velocity decay in both ceiling and floor regions. Both the velocity and temperature profiles agreed with results obtained from literature. Both airflow boundary layer and thermal boundary layer growths increased with traveling distance of air-jet. Maximum floor velocity and floor temperature difference were fitted well with different parameters. Analysis of airflow performance in a non-isothermal condition makes progress in predicting air quality inside the enclosures and guides the design concepts of ventilation system for an indoor environment. r

show abstract