Karakteristik perpindahan panas konvektif jet sintetik dengan variasi jarak tumbukan = Convective heat transfer characteristic of synthetic jet with variation of impinging distance
Situngkir, Christoforus Deberland;
Harinaldi, supervisor; Budiarso, examiner; Warjito, examiner; Agus Sunjarianto Pamitran, examiner; Yudan Whulanza, examiner
(Fakultas Teknik Universitas Indonesia, 2013)
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Dewasa ini, beban panas yang semakin besar akibat meningkatnya kecepatan operasidan densitas komponen pada suatu piranti elektronik menyebabkan perlunya sistempendingin baru yang lebih efisien atau mempunyai disipasi panas yang tinggi. Jetsintetik potensial untuk digunakan sebagai pendingin komponen elektronik. Paper inimelaporkan hasil dari studi eksperimental mengenai pengaruh Jarak Tumbukan(impinging distance) pada performa pendinginan dengan tumbukan jet sintetik. Rasiojarak aksial antara permukaan yang dipanaskan dan jet (L) terhadap diameter orifis jet(d) berada pada jangkauan 0-3.3. Investigasi dilakukan dengan menggunakanprototipe jet sintetik yang memiliki 16 lubang dengan diameter tiap lubang 3 mm dandigerakkan oleh dua membran piezoelektrik 5 volt dengan eksitasi gelombangsinusoidal. Dengan sistem aparatus tersebut diteliti karakteristik dari perpindahanpanas konvektif yang dihasilkan membran yang berosilasi. Hasil penelitianmenunjukkan adanya pengaruh ketinggian orifis yang signifikan terhadap lajuperpindahan panas yang didapat. Pada frekuensi eksitasi tinggi 160 Hz, kenaikkannilai perpindahan sebanding dengan kenaikkan rasio L/d hingga nilai L/d sebesar 2kemudian turun hingga L/d sebesar 3,3. Nowadays, A greater heat load due to miniaturization of electronic products causesthe need for a new cooling system that works more efficient and has a high thermalefficiency, Synthetic jet is potentially useful for cooling of electronic components. Inthis study, numerical simulations are performed to investigate the effect of variousthe distance between the orifice and the heated surface (L) on the ensuing syntheticjet flow. In this research the investigation was carried out by comtutational methodsusing the software CFD (Computational Fluid Dynamics), it will be seen thecharacteristics of convective heat transfer by moving the synthetic jet membrane. Acircular orifice synthetic jet is simulated assuming axisymmetric behaviour. Thequality of results is verified by time and convective heat transfer studies, and theresults are validated against existing experimental. In this research the model wassimulated to examine the distribution of heat flow on the walls using a mathematicalturbulen model k-w SST. Meshing order was elements Tet/Hybrid and type Tgrid.The boundary conditions were inlet velocity of 1.5 m/s, 2 m/s and 1 m/s, thefrequency of membrane vibration were 80 Hz, 120 Hz, 160 Hz and the amplitudewere 1 mm/s, 2 mm/s, 1.5 mm/s. The Reynolds number (Re) is in the range of 1421 –2843 based on average velocity, while the normalized axial distance varies between 0and 3.3. The movement of the piezo membrane is assumed of sinusoidal motionwhich moves up and down correspond to the suction and blowing phase respectively.The results showed the significant influence of L/D Ratio and sinusoidal wavefrequencies to the heat transfer rate that obtained. At small axial distance (L),recirculation of fluid occurs due to confinement, owing to the presence of the orificeplate. However, at large axial distances, the jet velocity reduces due to entrainment ofstill ambient air, which again reduces the heat transfer coefficient. |
 T35771-Christoforus Deberland Situngkir.pdf :: Unduh
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| No. Panggil : | T35771 |
| Entri utama-Nama orang : | |
| Entri tambahan-Nama orang : | |
| Entri tambahan-Nama badan : | |
| Subjek : | |
| Penerbitan : | Depok: Fakultas Teknik Universitas Indonesia, 2013 |
| Program Studi : |
| Bahasa : | ind |
| Sumber Pengatalogan : | LibUI ind rda |
| Tipe Konten : | text |
| Tipe Media : | unmediated ; computer |
| Tipe Carrier : | volume ; online resource |
| Deskripsi Fisik : | xvii, 97 pages : illustration ; 28 cm.+ appendix |
| Naskah Ringkas : | |
| Lembaga Pemilik : | Universitas Indonesia |
| Lokasi : | Perpustakaan UI, Lantai 3 |
| No. Panggil | No. Barkod | Ketersediaan |
|---|---|---|
| T35771 | 15-23-89352585 | TERSEDIA |
| Ulasan: |
| Tidak ada ulasan pada koleksi ini: 20350103 |
