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- Newsgroups: sci.engr.mech
- Path: sparky!uunet!utcsri!torn!cunews!disaacs
- From: disaacs@pietrzak.carleton.ca (Dave Isaacs)
- Subject: Re: modified turboprop into car
- Message-ID: <disaacs.715021030@cunews>
- Sender: news@cunews.carleton.ca (News Administrator)
- Organization: Carleton University
- References: <Yeb7VDe00VpKQ67kkH@andrew.cmu.edu> <24238@oasys.dt.navy.mil>
- Date: Fri, 28 Aug 1992 16:57:10 GMT
- Lines: 33
-
- In <24238@oasys.dt.navy.mil> goldberg@oasys.dt.navy.mil (Mark Goldberg) writes:
-
- >Chrysler actually tried this in the early 1960's. The gas turbine engine
- >(that's what a turboprop is) was front mounted and featured a type of
- >recuperator in the cycle. It consisted of a rotating wheel thru which
- >exhaust would passed, heating the wheel. The other part of its rotation
- >was in the high-pressure stream.
-
- >Apparently, there were many practical propblems with make this type
- >of engine impractical for passenger car transportation - cost of material
- >for the blades etc (titanium), hot exhaust, and susceptibility to damage
- >by debris in the exhaust. Foreign object damage (FOD) is a major concern
- >at airports, for that reason.
-
- >However, I have no doubt that some new technology may change things.
- >Already, turbocharged engines are featured in many cars. These integrate
- >an element of gas turbine propulsion into a reciprocating engine (compressor
- >driven by exhaust gas).
-
- I have always belived that the main objection to using gas turbines in
- cars was that in a car you are very rarely running at full power, and at
- part load powers gas turbines have a very poor specific fuel consumption.
- By adding intercooling and a heat exchanger you can get good performance at
- low power, but then the thing is so complicated that maintainance becomes
- a serious problem.
-
- --
- __________________________________________________________________________
- ____ ____ __ David Paul Isaacs ________________________________________
- _____ _____ __ Department of Mechanical and Aerospace Engineering ________
- _____ ____ __ Carleton University ________________________________________
- ____ __ __ Ottawa, Ontario ___________________________________________
- _________________disaacs@ccs.carleton.ca __________________________________
-