Liftoff of Propane - Air Diffusion Flames By Axis Symmetric Co-flow Air Injection  

Oleh:

Rulianto, Dimitri ; Dhiputra, I Made Kartika ; Harinaldi ; Caturwati, NK

Jenis: Article from Journal - ilmiah nasional
Dalam koleksi: Lemigas Scientific Contributions to Petroleum Science & Technology vol. 32 no. 03 (Dec. 2009), page 214.
Topik: Difjilsion; Combustion; Lifted-Flame; Lifted-Distance

Ketersediaan

Perpustakaan PKPM Nomor Panggil: L15.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Combustion of gas with d(ffilsion system is widely used in many residential gas appli­ances like stove, engine furnaces and industrial furnaces. Phenomenon of lifted flame is often happened at diffusion flame where the stream of fuel and ai,. into combustor flmv separately. Hence the combustion process needs time so that mixing of air and fuel reach the condition ready for burnt. This condition make the burner tip protected from high thermal load and more safe to operate. in this paper, propane was ejected into quiescence air through nozzle having 1.8 mm holes diameter. Fuel flow rate was increased until liftoff conditions exceed; hereinafter flow rate of filel was made constant at 69 ml/s and air was ejected around of filel with axis symmetric flow. Liftoff behavior of diffilsion flames was investigated for various air flow rate: 17.9 ml/s - 89.9 ml/s. Lifted distance decreased from 130 mm to 90 mm when air was injected with flow rate of 19.1 ml/s, however, it increased to 100 mm when air flow rate increased to 35.9 ml/s. Cold-flow simulation showed the moderate air flmv rate give a faster density degrada­tion at axial line compared to larger air flow rate. It means moderate jlow rate of air support a better air-fuel mixing than faster one.

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