Unsteady flow-induced vibration of the slider in a commercial hard disk drive
The Flow-Induced Vibration (FIV) of Head Gimbal Assembly (HGA) occurred as a result of turbulent airflow within the commercial hard disk drive HDD. Therefore, this project aims to conduct an investigation through numerical simulation to determine the characteristics of FIV of the HGA. To perf...
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sg-ntu-dr.10356-541052023-03-04T18:45:48Z Unsteady flow-induced vibration of the slider in a commercial hard disk drive Toh, Jeffrey See Ren. Huang Xiaoyang School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Fluid mechanics The Flow-Induced Vibration (FIV) of Head Gimbal Assembly (HGA) occurred as a result of turbulent airflow within the commercial hard disk drive HDD. Therefore, this project aims to conduct an investigation through numerical simulation to determine the characteristics of FIV of the HGA. To perform the simulation, a simplified 2-dimensional Large Eddy Simulation (LES) model was constructed, by having channel flow around a rectangular block with the use of FLUENT in ANSYS Workbench. The variation in pressure and velocity over several nodes of around the HGA was then observed by consolidating the data with the aid of MatLab. From the results obtained and analyzed in the frequency domain, high activities in pressure and x-velocity fluctuations were observed at locations directly above and beneath the HGA plate. This was due to high turbulence in these regions. The results had also shown that pressure fluctuations around the HGA plate were highly related with FIV, with principle peaks occurring at approximately 1.5 kHz, 2.8 kHz, 4.3 kHz. Similarly, principle peaks of velocity fluctuations occurred at the frequencies corresponding to those of pressure fluctuations. Based on the corresponding drag force which was calculated by having the difference of transient pressure between two nodes, it was observed that the drag force had a direct aerodynamic excitation of the FIV on the HGA plate. In conclusion, the characteristics of FIV of the HGA plate could be analysed through the studying the behaviour of pressure and x-velocity fluctuations around the HGA plate. Bachelor of Engineering (Mechanical Engineering) 2013-06-13T08:18:07Z 2013-06-13T08:18:07Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/54105 en Nanyang Technological University 88 p. application/pdf |
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DRNTU::Engineering::Mechanical engineering::Fluid mechanics Toh, Jeffrey See Ren. Unsteady flow-induced vibration of the slider in a commercial hard disk drive |
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The Flow-Induced Vibration (FIV) of Head Gimbal Assembly (HGA) occurred as a result of turbulent airflow within the commercial hard disk drive HDD. Therefore, this project aims to conduct an investigation through numerical simulation to determine the characteristics of FIV of the HGA.
To perform the simulation, a simplified 2-dimensional Large Eddy Simulation (LES) model was constructed, by having channel flow around a rectangular block with the use of FLUENT in ANSYS Workbench. The variation in pressure and velocity over several nodes of around the HGA was then observed by consolidating the data with the aid of MatLab.
From the results obtained and analyzed in the frequency domain, high activities in pressure and x-velocity fluctuations were observed at locations directly above and beneath the HGA plate. This was due to high turbulence in these regions. The results had also shown that pressure fluctuations around the HGA plate were highly related with FIV, with principle peaks occurring at approximately 1.5 kHz, 2.8 kHz, 4.3 kHz. Similarly, principle peaks of velocity fluctuations occurred at the frequencies corresponding to those of pressure fluctuations. Based on the corresponding drag force which was calculated by having the difference of transient pressure between two nodes, it was observed that the drag force had a direct aerodynamic excitation of the FIV on the HGA plate.
In conclusion, the characteristics of FIV of the HGA plate could be analysed through the studying the behaviour of pressure and x-velocity fluctuations around the HGA plate. |
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Huang Xiaoyang |
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Huang Xiaoyang Toh, Jeffrey See Ren. |
format |
Final Year Project |
author |
Toh, Jeffrey See Ren. |
author_sort |
Toh, Jeffrey See Ren. |
title |
Unsteady flow-induced vibration of the slider in a commercial hard disk drive |
title_short |
Unsteady flow-induced vibration of the slider in a commercial hard disk drive |
title_full |
Unsteady flow-induced vibration of the slider in a commercial hard disk drive |
title_fullStr |
Unsteady flow-induced vibration of the slider in a commercial hard disk drive |
title_full_unstemmed |
Unsteady flow-induced vibration of the slider in a commercial hard disk drive |
title_sort |
unsteady flow-induced vibration of the slider in a commercial hard disk drive |
publishDate |
2013 |
url |
http://hdl.handle.net/10356/54105 |
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1759857845474426880 |