Experimental Study of a Densely Perforated Plate Bending

HHO merupakan gas hasil elektrolisa air yang dapat digunakan sebagai bahan bakar tambahan pada motor bakar. Penelitian ini bertujuan mengetahui karakteristik generator HHO menggunakan elektroda pelat berlubang. Elektroda yang dipakai berupa pelat aluminium dengan ukuran 60 x 60 x 0.5 mm3 dengan variasi tanpa lubang, 4 lubang, 6 lubang, dan 9 lubang. Masing-masing lubang berdiameter 4 mm. Variasi tegangan input 3,5; 6; 7,5; 9 Volt. Karakteristik yang diuji meliputi daya input, debit, dan efisiensi generator HHO. Hasil yang didapatkan dari penelitian ini adalah bahwa debit gas HHO yang terbesar dihasilkan dengan elektroda 9 lubang yaitu sebesar 5,77 cc/min dengan daya input 4,59 Watt. Sedangkan efisiensi generator tertinggi juga dihasilkan dengan elektroda 9 lubang yang mampu mencapai efisiensi 63,16 % dengan daya input 0,52 Watt.

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Experimental Study of Vortex Shedding From a Solid Sphere in Turbulent Freestream

Volume 1: Symposia, Parts A and B ◽

10.1115/fedsm2005-77168 ◽

2005 ◽

Cited By ~ 2

Author(s):

Himanshu Tyagi ◽

Rui Liu ◽

David S.-K. Ting ◽

Clifton R. Johnston

Keyword(s):

Experimental Study ◽

Reynolds Number ◽

Flow Velocity ◽

Vortex Shedding ◽

Isotropic Turbulence ◽

Vortex Formation ◽

Perforated Plate ◽

Solid Sphere ◽

Mean Flow ◽

Static Pressure Distribution

The study of vortex shedding from a sphere assumes an important role because of its relevance to numerous aerodynamic and hydrodynamic applications. Parameters such as coefficient of drag and static pressure distribution are largely influenced by vortex shedding, and it is found by past studies that the freestream turbulence can interact and alter the vortex formation and shedding drastically. Most of these studies, however, were conducted in the low Reynolds number regime and the vortex shedding results had been described only qualitatively. To better understand the aerodynamics of a sphere in turbulent flow, an experimental study was initiated in a low speed wind tunnel to quantify the vortex shedding characteristics. The Reynolds number of the flow, based on the diameter of the sphere (d), was set at 3.3 × 104, 5 × 104 and 6.6 × 104 by varying the mean flow velocity. The sphere was placed at 20D (= 7.5d) downstream from a perforated plate, where D = 37.5 mm is the size of the holes in the perforated plate, uniquely designed for generating near-isotropic turbulence. Hot-wire measurements were taken at 10D (= 3.75d), 20D (= 7.5d) and 30D (= 11.25d) downstream of the sphere in absence and presence of the perforated plate. The vortex shedding frequency was deduced from the instantaneous flow velocity data.

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Experimental study on the acoustic field caused by the interference of supersonic jet with a perforated plate—The optical measurement of sound absorption

The Journal of the Acoustical Society of America ◽

10.1121/1.5137387 ◽

2019 ◽

Vol 146 (4) ◽

pp. 3000-3000

Author(s):

Yo Murata ◽

Kaku Murayama ◽

Tatsuya Ishii ◽

Koji Okamoto ◽

Hirofumi Daiguji ◽

...

Keyword(s):

Experimental Study ◽

Acoustic Field ◽

Sound Absorption ◽

Optical Measurement ◽

Supersonic Jet ◽

Perforated Plate

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Experimental study of premixed hydrogen-air flame quenching in a channel with the perforated plate

Fuel ◽

10.1016/j.fuel.2019.116733 ◽

2020 ◽

Vol 263 ◽

pp. 116733 ◽

Cited By ~ 3

Author(s):

Yang Wan ◽

Changjian Wang ◽

Quan Li ◽

Xinjiao Luo

Keyword(s):

Experimental Study ◽

Perforated Plate ◽

Flame Quenching

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Virtual Bending of Titanium Reconstructive Plates for Mandibular Defect Bridging: Review of Three Clinical Cases

Craniomaxillofacial Trauma & Reconstruction ◽

10.1055/s-0031-1293523 ◽

2011 ◽

Vol 4 (4) ◽

pp. 223-233 ◽

Cited By ~ 12

Author(s):

Chingiz Rahimov ◽

Ismayil Farzaliyev

Keyword(s):

Experimental Study ◽

Clinical Application ◽

Gold Standard ◽

Operating Time ◽

The Other ◽

Plate Bending ◽

Tumor Surgery ◽

Trial And Error ◽

Traumatic Injuries ◽

Mandibular Defect

The reconstruction of acquired mandibular defects due to ablative tumor surgery or traumatic injuries is still challenging. The gold standard in such treatment is application of reconstructive titanium plates, which should be contoured and adapted to the defect as much as possible because of their influence on postoperative functional and esthetic results. Traditionally, plate bending is achieved by trial and error intraoperatively. Use of stereolitography (STL) models potentially could reduce the risk of incorrect contouring as well as operating time. On the other hand, fabrication of STL is time-consuming and costly. However, we found only one experimental study dedicating to virtual plate bending in the literature. The aim of this article was to demonstrate clinical application of a method of virtual bending of reconstructive plate for mandibular defect bridging. No significant complications occurred, and satisfactory functional and esthetic results were achieved in all cases. We found this technique precise and applicable in cases of reconstruction of mandibular defects.

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