Enhancement of ignition of a gas turbine by the addition of small amounts of H₂O₂

Abstract

A novel ignition system was studied experimentally, in which small volumes of hydrogen peroxide – of the order of µL/s – were injected at the site of ignition, during the firing of a focus discharge igniter. Experiments were made at an atmospheric testing facility using an industrial Rolls-Royce olympus combustion chamber with kerosene Jet A1 as the fuel and atmospheric air as the oxidizer. The study concentrated on the determination of the lean ignition limits of the Jet A1–air mixture at various air mass flowrates with and without the addition of H2O2. Notable improvements, from 6.5 per cent to 44 per cent, in the ignition limits of the kerosene–air mixture were attainable using only a small amount of H2O2 during the ignition process. The study suggests that these improvements are directly related to the increase in the ignition efficiency of the igniter.

The extraordinary design of the bombardier beetle - A classic example of biomimetics

“…One of the main uses of hydrogen peroxide is the manufacture of "green" bleaching agents such as perborates and percarbonates for the paper and textile industries. Other significant uses include wastewater treatment, cleaning printed circuit boards, food bleaching with diluted H 2 O 2 , cleaning wounds and hospital instruments with very diluted H 2 O 2 , activation of land based gas turbines under fuel lean conditions by adding small amounts of H 2 O 2 to the aviation fuel (Prongidis et al 2012) and military uses for combustion.…”

Ανάλυση Πολλαπλών Κλιμάκων Ανάφλεξης Υδρογονανθράκων

“…Η επίδραση της προσθήκης υπεροξειδίου του υδρογόνου εξετάστηκε επίσης και για άλλα καύσιµα. Η περίπτωση των ορίων ανάφλεξης φτωχών µιγµάτων κηροζίνης διερευνήθηκε πειραµατικά σε βιοµηχανικό θάλαµο καύσης σε ατµοσφαιρικές συνθήκες, µε τη χρήση τροποποιηµένου αναφλεκτήρα για την έγχυση µικρών ποσοτήτων υγρού H 2 O 2 (έως 10.8 µL/s) [142]. Μετρήθηκε µείωση κατά περισσότερο από 10% του ελάχιστου, µέγιστου και µέσου χρόνου ανάφλεξης, τα οποία αποδόθηκαν στην επίδραση της χηµείας.…”