par c.foussa Lun 28 Mai 2018 - 15:24
Rolls-Royce’s all-new Pearl 15 builds on technologies that have been under development for several years in the firm’s Advance2 program. The engine won EASA certification in February and is already flying on the first of Bombardier’s test aircraft. Key performance improvements over the BR710 that powers Bombardier’s current Global family include:
• 7% better specific fuel consumption
• a two-decibel reduction in noise, bringing it to 14 EPNdb under Stage 4
• up to 9% better takeoff thrust in hot and high conditions
• reduced NOx emissions with 35% more margin than the CAEP VI rules, with smoke emission margins 48% better than the already-excellent BR710 engine
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Features include:
• a 48.5-inch titanium fan
• a new ten-stage HP compressor with six titanium blisk stages and a 40% higher compression ratio of 24:1 — world-class in this kind of engine, says Geisinger
• a new ultra-low emissions combustor to minimize emissions, noise, and NOx levels
• a new two-stage, shroudless high-pressure turbine with a fully modulated case cooling system to reduce fuel consumption and to ensure efficiency
• a three-stage shrouded low-pressure turbine enhanced for higher temperatures and pressures
Extraits de l'article:
http://aviationweek.com/ebace-2018/rolls-royce-barrels-back-bizjets-pearl-engine?NL=AW-05&Issue=AW-05_20180528_AW-05_559&sfvc4enews=42&cl=article_1&utm_rid=CPEN1000002755066&utm_campaign=15017&utm_medium=email&elq2=3ddee07dacf7495e8110186d8383ecd9