Simulasi karakteristik hydrodinamika pada pulse combustor berbasis CFD

Salihat, Esfaning and Tikasari, Rachma (2015) Simulasi karakteristik hydrodinamika pada pulse combustor berbasis CFD. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh inlet pulse dan inlet konstan terhadap karakteristik pembakaran, serta pengaruh excess air dan geometri pulse combustor terhadap karakteristik dan performa pembakaran yang terjadi pada pulse combustor berbasis CFD (Computational Fluid Dynamics) menggunakan FLUENT melalui analisa temperatur, tekanan, dan kecepatan aliran. Metode simulasi berbasis CFD digunakan karena sulitnya mengamati mekanisme pulse combustion yang sangat kompleks. Geometri pulse combustor yang digunakan berbentuk silinder dengan panjang 136 dan 250 mm, inlet dengan diameter 4 mm, dan outlet dengan diameter 20 dan 10 mm. Bahan yang digunakan pada penelitian ini adalah udara dan propana pada temperatur 27oC dan tekanan 1 atm. Variabel yang digunakan untuk analisa karakteristik pembakaran adalah inlet pulse dan inlet konstan, sedangkan untuk analisa karakteristik pembakaran pulse adalah excess air dan geometri pulse combustor. Metodologi yang dilakukan meliputi beberapa tahapan diantaranya: membuat model geometri dan grid-nya, menentukan model, kondisi operasi, kondisi batas, parameter, dan penyelesaian hasil yang diamati dalam proses pembakaran pada pulse combustor. Hasil penelitian menunjukkan bahwa pembakaran dengan inlet pulse memberikan hasil yang efektif dan efisien dibandingkan dengan inlet konstan. Semakin tinggi excess air akan menurunkan suhu hasil pembakaran dan meningkatkan amplitudo tekanan. Geometri pulse combustor dengan luas penampang area perpindahan panas yang besar memberikan hasil pembakaran yang semakin efektif. ===================================================================================================== The purpose of this research is to study the affect of pulse and constant inlet for combustion characteristics, and also the affect of excess air and pulse combustor geometry for combustion characteristics and performances on pulse combustor based on CFD (Computational Fluid Dynamics) using FLUENT through temperature, pressure, and fluid velocity analysis. Simulation method based on CFD (Computational Fluid Dynamics) is used because it is difficult to observe the complex mechanism of pulse combustion. Pulse combustors geometry that used in this research is cylinder which has length 136 and 250 mm, inlet with diameter 4 mm, and outlet with diameter 20 and 10 mm. The material used in this research is air and propane at temperature 27oC and pressure 1 atm. Variables which applied to analyze combustion characteristics are pulse and constant inlet, and to analyze pulse combustion characteristics are excess air and pulse combustor geometry. The methodology that will be conducted includes some stages: designing of geometry model and its grid, determining of model used, operating condition, boundary condition, parameter, and solving the simulation of pulse combustor. The result show that combustion with pulse inlet give more effective and efficient combustion performances than constant inlet. The outlet temperature of combustion was decreased and the pressure amplitude was increased with the increase of the excess air. Pulse combustor geometry with large heat transfer area give more effective combustion performances.

Item Type: Thesis (Undergraduate)
Additional Information: RSK 620.106 4 Sal s
Uncontrolled Keywords: CFD; pulse combustion; geometri pulse combustor; karakteristik hidrodinamika ========================================================================================= CFD; pulse combustion; pulse combustor geometry; hydrodynamic characteristics
Subjects: Q Science > QA Mathematics > QA911 Fluid dynamics. Hydrodynamics
T Technology > TJ Mechanical engineering and machinery > TJ935 Pipe--Fluid dynamics.
Divisions: Faculty of Industrial Technology > Chemical Engineering > 24201-(S1) Undergraduate Thesis
Depositing User: - Taufiq Rahmanu
Date Deposited: 02 Apr 2019 03:14
Last Modified: 02 Apr 2019 03:14
URI: http://repository.its.ac.id/id/eprint/62679

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