ANALISIS PERUBAHAN ENERGI DAN PERHITUNGAN PRESSURE LOSS FACTOR PADA COMBUSTION CHAMBER ENGINE JT8D TURBOFAN

SAMUEL AITAN, YOSEPH (2019) ANALISIS PERUBAHAN ENERGI DAN PERHITUNGAN PRESSURE LOSS FACTOR PADA COMBUSTION CHAMBER ENGINE JT8D TURBOFAN. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

JT8D engine is a turbofan engine that has 9 chambers with 1-state fan, 6- stage LP, 7-stage axial flow compressor type. The turbofan engine is known to have a bleed valve that functions to distribute bleed air where the bleed air is directly related to the performance generated in the combustion chamber. Further research needs to be done to find out how much influence the bleed valver has on the engine's performance where the parameters that need to be known are the value of the energy change and the value of the pressure loss factor. The object of research analyzed includes the calculation of air flow in the JT8D combustion chamber engine. In analyzing energy changes in the JT8D combustion chamber engine using chemical reactions from the combustion process and the calculation of Pressure Loss Factor (PLF) using JT8D cell test engine data in 2014. The results of the chemical reaction of the combustion process of fuel (C6H14) with Oxygen (O2) obtained chemical reactions 2C6H14(l)+ 19O2(g) → 12 CO2(g)+14H2O(l). In the calculation of energy changes in the combustion chamber, the value in the whole reaction ΔU0 is -7.385,6 kJ / mol. In the calculation of PLF that has been done it can be seen that the PLF that occurs when bleed close is greater than the PLF when bleed open is smaller where the value obtained when bleed open is 3,678 × 10−3 or 0,003678 and when bleed close, a value of 4,06199 × 10−3 is obtained or 0,46199.

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