Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing
The Federal Aviation Administration requires all aircraft manufacturers to adhere to maximum noise level standards. Thus, a bias acoustic liner is introduced, to intensify the noise equipment system, as well as prevent ice accumulation on the nacelle D-chamber. The hotspot phenomenon, by the Piccolo...
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| Format: | Monograph |
| Language: | English |
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Universiti Sains Malaysia
2018
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| Online Access: | http://eprints.usm.my/52809/ http://eprints.usm.my/52809/1/Effect%20Of%20Nozzle%20Rotation%20Angles%20And%20Sizes%20On%20Thermal%20Characteristic%20Of%20Swirl%20Anti-Icing.pdf |
| _version_ | 1848882352726474752 |
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| author | Ismail, Mohd Azmi |
| author_facet | Ismail, Mohd Azmi |
| author_sort | Ismail, Mohd Azmi |
| building | USM Institutional Repository |
| collection | Online Access |
| description | The Federal Aviation Administration requires all aircraft manufacturers to adhere to maximum noise level standards. Thus, a bias acoustic liner is introduced, to intensify the noise equipment system, as well as prevent ice accumulation on the nacelle D-chamber. The hotspot phenomenon, by the Piccolo tube anti-icing system, could damage the bias acoustic liner. Therefore, a swirl anti-icing system is further investigated, to reduce the hotspot effect on die bias acoustic liner. The present work investigates the effect of nozzle rotation angles at various mass-flow-rates of hot-air supplied on the nacelle lip-skin temperature distribution, in order to enhance the swirl anti-icing system's performance. The effect of the nozzle ratio area on the swirl anti-icing system's performance to be discussed in the present work. The simulation results show that the hotspot temperature decreases by 26 % and the cold spot temperature increases by 18 %, as the nozzle to be rotated from 0° to 13° towards the inner skin. However, the nozzle ratio area shows a negative effect on the swirl anti-icing performance, where the hotspot temperature increases by 6.7% and the cold spot temperature decreases by 30.2 % with the ratio nozzle area increasing from 0.1083 to 0.8354. According to swirl anti-icing empirical values, the average Nusselt number is directly pro-portional to the average Reynolds number. In conclusion, the temperature distribution on the nacelle lip-skin and the swirl anti-icing system's performance improves as the angle of nozzle direction increases, rotating towards the inner skin Swirl anti-icing does not generate hotspot on the inner skin, thus making it suitable for use in a bias acoustic liner system. |
| first_indexed | 2025-11-15T18:33:33Z |
| format | Monograph |
| id | usm-52809 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T18:33:33Z |
| publishDate | 2018 |
| publisher | Universiti Sains Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-528092022-06-09T04:57:10Z http://eprints.usm.my/52809/ Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing Ismail, Mohd Azmi T Technology TJ Mechanical engineering and machinery The Federal Aviation Administration requires all aircraft manufacturers to adhere to maximum noise level standards. Thus, a bias acoustic liner is introduced, to intensify the noise equipment system, as well as prevent ice accumulation on the nacelle D-chamber. The hotspot phenomenon, by the Piccolo tube anti-icing system, could damage the bias acoustic liner. Therefore, a swirl anti-icing system is further investigated, to reduce the hotspot effect on die bias acoustic liner. The present work investigates the effect of nozzle rotation angles at various mass-flow-rates of hot-air supplied on the nacelle lip-skin temperature distribution, in order to enhance the swirl anti-icing system's performance. The effect of the nozzle ratio area on the swirl anti-icing system's performance to be discussed in the present work. The simulation results show that the hotspot temperature decreases by 26 % and the cold spot temperature increases by 18 %, as the nozzle to be rotated from 0° to 13° towards the inner skin. However, the nozzle ratio area shows a negative effect on the swirl anti-icing performance, where the hotspot temperature increases by 6.7% and the cold spot temperature decreases by 30.2 % with the ratio nozzle area increasing from 0.1083 to 0.8354. According to swirl anti-icing empirical values, the average Nusselt number is directly pro-portional to the average Reynolds number. In conclusion, the temperature distribution on the nacelle lip-skin and the swirl anti-icing system's performance improves as the angle of nozzle direction increases, rotating towards the inner skin Swirl anti-icing does not generate hotspot on the inner skin, thus making it suitable for use in a bias acoustic liner system. Universiti Sains Malaysia 2018-05-14 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/52809/1/Effect%20Of%20Nozzle%20Rotation%20Angles%20And%20Sizes%20On%20Thermal%20Characteristic%20Of%20Swirl%20Anti-Icing.pdf Ismail, Mohd Azmi (2018) Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Mekanik. (Submitted) |
| spellingShingle | T Technology TJ Mechanical engineering and machinery Ismail, Mohd Azmi Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing |
| title | Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing |
| title_full | Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing |
| title_fullStr | Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing |
| title_full_unstemmed | Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing |
| title_short | Effect Of Nozzle Rotation Angles And Sizes On Thermal Characteristic Of Swirl Anti-Icing |
| title_sort | effect of nozzle rotation angles and sizes on thermal characteristic of swirl anti-icing |
| topic | T Technology TJ Mechanical engineering and machinery |
| url | http://eprints.usm.my/52809/ http://eprints.usm.my/52809/1/Effect%20Of%20Nozzle%20Rotation%20Angles%20And%20Sizes%20On%20Thermal%20Characteristic%20Of%20Swirl%20Anti-Icing.pdf |