INVESTIGATION OF THE PERFORMANCE FOR A GAS TURBINE JET ENGİNE BY USING EXERGY ANALYSIS METHOD

Öz

   This study deals with a gas turbine jet engine module which was analyzed to investigate its performance at three different gas turbine speed values. The objectives are: to examine the thermodynamic processes involved, to determine the theoretical and measured data for the compressor, the combustion chamber and the gas turbine and to perform the energy and exergy balances on the jet engine components. The jet engine can operate up to the120000 rpm. The measured data include pressure, temperature, air flow rate, fuel flow rate and thrust values. This paper presents measured experiment data and analytical results of the jet engine. Since the compressor outlet temperature of the part load-1 is the minimum of all, it has the minimum work gained from the gas turbine. The exergy destructions caused by the combustion chamber were the maximum above all system components. It can be inferred from the analysis that the more loading applied to the jet engine the more exergy gained from the fuel. However the exergy efficiencies become lower. They were calculated as 7.1%, 6% and 5.5%, respectively.

Anahtar Kelimeler

• Jet engine,Exergy analysis,Energy Analysis,Part load

EKSERJİ ANALİZİ YÖNTEMİ KULLANILARAK BİR GAZ TÜRBİNLİ JET MOTORUNUN PERFORMANS ARAŞTIRMASI

Öz

   Bu çalışmada bir gaz türbinli jet motorunun üç farklı devir sayısı için performans analizi yapılmıştır. Çalışmanın amacı kompresör, yanma odası ve gaz türbini için teorik ve ölçüm sonucu elde edilen verilerin termodinamik süreçler  dikkate alınarak incelenmesi ve jet motoru bileşenlerinin enerji ve ekserji dengelerinin elde edilmesidir. Ele alınan jet motorunun devir sayısı 120.000 d/d değerine kadar artırılabilmektedir. Ölçülen veriler basınç, sıcaklık, hava akımının debisi, yakıtın debisi ve itki değerleridir. Bu makalede jet motoruna ait ölçülen verilere ve analitik sonuçlara yer verilmiştir. Birinci kısmi yük için kompresör çıkış sıcaklığı en düşük olduğu için gaz türbininden elde edilen iş miktarı da en düşük değerdedir. Yanma odasının ekserji yıkım miktarları üç farklı yük değerinde de en yüksek değerlerdedir. Jet motorunun çalışma yükü artırıldıkça yakıttan daha fazla ekserji elde edilmektedir. Buna rağmen ekserji verimi ise çalışma yükü arttıkça azalmaktadır. Ekserji verimleri sırasıyla %7.1, %6 ve %5.5 olarak bulunmuştur.

Anahtar Kelimeler

• Jet motoru,Ekserji analizi,Enerji analizi,Kısmi yük

Kaynakça

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