Pratt-Whitney has launched the energy-efficient Geared Turbofan engine to power the new Mitsubishi Regional Jet. The airframe application for the Geared Turbofan was designed to deliver a significant reduction in fuel burn and noise with lower environmental emissions and operating costs. The Mitsubishi Regional Jet is a 70 to 90 passenger aircraft. Mitsubishi expects a global demand of about 5,000 of the jets over the next 20 years.
The Geared Turbofan allows the engine's fan to operate independent of the low-pressure compressor and turbine, which results in greater fuel efficiency and a slower fan speed for less noise. Pratt-Whitney says the engine builds on more than 20 years of development with technology improvements in every module. Full-scale engine testing will begin later this year and flight testing is slated for 2008.
A bold, gold, open-air coupe may not be the ticket to automotive nirvana for every consumer, but Lexus’ LF-C2 concept car certainly turned heads at the recent Los Angeles Auto Show. What’s more, it may provide a glimpse of the luxury automaker’s future.
The complexity of diesel engines means optimizing their performance requires a large amount of experimentation. Computational fluid dynamics (CFD) is a very useful and intuitive tool in this, and cold flow analysis using CFD is an ideal approach to study the flow characteristics without going into the details of chemical reactions occurring during the combustion.
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