### Abstract

Pulsed air jet impingement system is one of the most important area of heat transfer studies due to its wide engineering applications in heating and cooling such as in textile drying and electronics cooling. In this paper, the tests parameters used are a constant Reynolds number of 16000, Copper impingement plate surface temperature of 100°C, radial distance to nozzle outlet diameter ratio (r/d) in the range of 0 and 6 and different pulse frequencies of 0 Hz and 60 Hz. Duty cycles of 0.18, 0.27, 0.31 and 0.35, the cylindrical pulse mechanism shape with four different circular areas of 314.16, 514.16, 614.16, and 714.16 mm^{2} and two different nozzle diameters of 15 and 20 mm diameter are used. The objectives of this paper are to determine the effect of pulse shape and the nozzle diameter towards the heat transfer enhancement. Results obtained show that for nozzle with diameter of 20 mm (pulse shape 4), the maximum heat transfer rate is recorded at plate distance to nozzle outlet ratio (z/d) equals to 4 and for 15 mm nozzle diameter (pulse shape 1), the maximum heat transfer rate is recorded at z/d equals to 2. Optimum frequency is between 30 Hz and 50 Hz while highest heat transfer enhancement is between z/d of 2 and 4.

Original language | English |
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Title of host publication | Proceedings - 2012 7th International Conference on Computing and Convergence Technology (ICCIT, ICEI and ICACT), ICCCT 2012 |

Pages | 1401-1406 |

Number of pages | 6 |

Publication status | Published - 2012 |

Event | 2012 7th International Conference on Computing and Convergence Technology (ICCIT, ICEI and ICACT), ICCCT 2012 - Seoul Duration: 3 Dec 2012 → 5 Dec 2012 |

### Other

Other | 2012 7th International Conference on Computing and Convergence Technology (ICCIT, ICEI and ICACT), ICCCT 2012 |
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City | Seoul |

Period | 3/12/12 → 5/12/12 |

### Fingerprint

### Keywords

- Heat Transfer
- Impingement System
- Nozzle
- Pulse Shape
- Pulsed Air Jet

### ASJC Scopus subject areas

- Computer Science Applications
- Software

### Cite this

*Proceedings - 2012 7th International Conference on Computing and Convergence Technology (ICCIT, ICEI and ICACT), ICCCT 2012*(pp. 1401-1406). [6530560]

**Influence of pulse shape of single pulsed air jet impingement system on heat transfer?** / Zulkifli, Rozli; Salim, Nor Adrian Nor; Ismail, Ahmad Fadhil; Abdullah, Shahrir.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proceedings - 2012 7th International Conference on Computing and Convergence Technology (ICCIT, ICEI and ICACT), ICCCT 2012.*, 6530560, pp. 1401-1406, 2012 7th International Conference on Computing and Convergence Technology (ICCIT, ICEI and ICACT), ICCCT 2012, Seoul, 3/12/12.

}

TY - GEN

T1 - Influence of pulse shape of single pulsed air jet impingement system on heat transfer?

AU - Zulkifli, Rozli

AU - Salim, Nor Adrian Nor

AU - Ismail, Ahmad Fadhil

AU - Abdullah, Shahrir

PY - 2012

Y1 - 2012

N2 - Pulsed air jet impingement system is one of the most important area of heat transfer studies due to its wide engineering applications in heating and cooling such as in textile drying and electronics cooling. In this paper, the tests parameters used are a constant Reynolds number of 16000, Copper impingement plate surface temperature of 100°C, radial distance to nozzle outlet diameter ratio (r/d) in the range of 0 and 6 and different pulse frequencies of 0 Hz and 60 Hz. Duty cycles of 0.18, 0.27, 0.31 and 0.35, the cylindrical pulse mechanism shape with four different circular areas of 314.16, 514.16, 614.16, and 714.16 mm2 and two different nozzle diameters of 15 and 20 mm diameter are used. The objectives of this paper are to determine the effect of pulse shape and the nozzle diameter towards the heat transfer enhancement. Results obtained show that for nozzle with diameter of 20 mm (pulse shape 4), the maximum heat transfer rate is recorded at plate distance to nozzle outlet ratio (z/d) equals to 4 and for 15 mm nozzle diameter (pulse shape 1), the maximum heat transfer rate is recorded at z/d equals to 2. Optimum frequency is between 30 Hz and 50 Hz while highest heat transfer enhancement is between z/d of 2 and 4.

AB - Pulsed air jet impingement system is one of the most important area of heat transfer studies due to its wide engineering applications in heating and cooling such as in textile drying and electronics cooling. In this paper, the tests parameters used are a constant Reynolds number of 16000, Copper impingement plate surface temperature of 100°C, radial distance to nozzle outlet diameter ratio (r/d) in the range of 0 and 6 and different pulse frequencies of 0 Hz and 60 Hz. Duty cycles of 0.18, 0.27, 0.31 and 0.35, the cylindrical pulse mechanism shape with four different circular areas of 314.16, 514.16, 614.16, and 714.16 mm2 and two different nozzle diameters of 15 and 20 mm diameter are used. The objectives of this paper are to determine the effect of pulse shape and the nozzle diameter towards the heat transfer enhancement. Results obtained show that for nozzle with diameter of 20 mm (pulse shape 4), the maximum heat transfer rate is recorded at plate distance to nozzle outlet ratio (z/d) equals to 4 and for 15 mm nozzle diameter (pulse shape 1), the maximum heat transfer rate is recorded at z/d equals to 2. Optimum frequency is between 30 Hz and 50 Hz while highest heat transfer enhancement is between z/d of 2 and 4.

KW - Heat Transfer

KW - Impingement System

KW - Nozzle

KW - Pulse Shape

KW - Pulsed Air Jet

UR - http://www.scopus.com/inward/record.url?scp=84881177501&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84881177501&partnerID=8YFLogxK

M3 - Conference contribution

SN - 9788994364216

SP - 1401

EP - 1406

BT - Proceedings - 2012 7th International Conference on Computing and Convergence Technology (ICCIT, ICEI and ICACT), ICCCT 2012

ER -