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Steam related discussions.
Re: Seeking advice regarding turbocharging monotube boiler. - 4 years ago
Here are few technical papers on this topic: 1) Design and Testing of a 10KW Steam Turbine for Steam Turbochargers https://asmedigitalcollection.asme.org/GT/proceedings-pdf/IGT1985/79429/V001T02A042/2477607/v001t02a042-85-igt-113.pdf 2)Cycle efficiency of air cooled steam power plants https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700011267.pdf 3)Critique of Rankine automotiveby novice - SteamStuff
Re: Liquid piston engine design - 4 years ago
Many technical papers on steam propulsion ( and many other technologies) development can be found in this library: https://digital.library.unt.edu/search/ Theory and tests of two-phase turbines https://digital.library.unt.edu/ark:/67531/metadc1070252/m2/1/high_res_d/5346135.pdf Biphase turbine bottoming cycle for a diesel engine https://digital.library.unt.edu/ark:/67531/metadc1447687/m2/1/by novice - SteamStuff
Re: Steam turbine driven turbojet - 4 years ago
Steam turbine aircraft designed by Romanian inventor Traian Vuia in late 1930s - 55 pages with drawings and calculations: https://biblacad.ro/tvuia/gen/gen1.htmlby novice - SteamStuff
Liquid piston engine design - 4 years ago
https://www.sae.org/publications/technical-papers/content/2011-28-0137/ http://www.feslab.iis.u-tokyo.ac.jp/Doc/Fukuda_APAC2011.pdf "Recently, waste heat recovery system from automobile exhaust gas has attracted a lot of attention as one of the promising technology to improve fuel efficiency and to reduce carbon dioxide emission. In order to put this system into practice, we developed a nby novice - SteamStuff
Re: Steam Powered Tank - 4 years ago
1950s-1960s projects of vehicles powered by condensing closed cycle steam engines or turbines: https://tankandafvnews.files.wordpress.com/2016/07/steam-engine-tanks.pdf http://www.kimmelsteam.com/docs/Yuba%20Steam%20Vehicle1a.pdfby novice - SteamStuff
Two phase higher efficiency steam turbine for diesel engine - 5 years ago
https://digital.library.unt.edu/ark:/67531/metadc1447687/m2/1/high_res_d/7213494.pdf https://digital.library.unt.edu/ark:/67531/metadc1397228/m2/1/high_res_d/12250130.pdf Biphase turbine bottoming cycle for a diesel engine Higher efficiency of cycle is achieved by converting high velocity condensate kinetic energy into mechanical work. https://digital.library.unt.edu/ark:/67531/metadc107025by novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Steam turboprop design drawings and calculation. Flight speed 200-500 mph, altitude 15000-30000ft.by novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Idea of using closed vapor cycle for aircraft propulsion is not completely useless. It is great technical challenge and no one built any working steam aircraft since famous 1933 Besler's flight. Not because it is impossible, but because it was not as good for practical applications as other types of engines. Replica of Besler's steam engine aircraft can be a great project. It can be made signiby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Here is a study of the monotube boilers parameters optimization: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700018268.pdf. - CONDENSERS AND BOILERS FOR STEAM-POWERED CARS: A PARAMETRIC ANALYSIS OF THEIR SIZE, WEIGHT, AND REQUIRED FAN POWER. Low emission combustor/vapor generator for Rankine automotive engines https://nepis.epa.gov/Exe/ZyNET.exe/91011WQZ.TXT?ZyActionD=ZyDby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
May 1954 aircraft propulsion study by Fraas and Savolainen: Vapor-Cycle Compressor-jet The wide-spread use of vapor cycles has directed attention to water as a working fluid for the thermodynamic cycle of an aircraft power plant. The principal difficulty associated with such a power plant is the size, weight, and drag associated with the condenser. In attempting to establish the proportionsby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
There were and are several helicopters with a tip-jet engines powered by steam/oxygen products of hydrogen peroxide reaction. It is not cheap and not energy dense fuel. It is possible to build a helicopter with steam engine or steam turbine, but not easy to design steam condenser, unless it is enclosed in ducted cooling fan. Steam engine powered helicopter https://patents.google.com/patentby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Hypothetical design parameters of the 1942 Leduc's steam turbine thermojet aircraft engine based on 1940 Campini-Caproni prototype: Boiler efficiency -90% Steam pressure- 1910 psi Steam temperature - 1000 F Steam turbine exhaust - 50 psi Condensing steam temperature - 298 F Turbine power - 900 kW/1206 hp@85% efficiency Energy flow in- 15.1 MMBtu/hr Steam condenser capacity - 12.1 MMBtu/hrby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
"Bureau of Aeronautics Design Memo #120 - Steam Power Plant for Airships" https://www.flyingkettle.com/priorpdf/ba120.pdf NACA Technical Note #239 - "Steam Power Plant for Aircraft" https://www.flyingkettle.com/priorpdf/tenot239.pdf Besler steam aircraft engine test https://www.flyingkettle.com/jvfiles/bes1958.pdf https://www.flyingkettle.com/jvfiles/bes1958p2by novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Pratt&Whitney's steam turbojet had 5000 psi pressure due to: 1) lower weight- 49000 hp turbine weight was about 3000 lbs 2) good efficiency at high condensing temperature 3) smaller, lighter and more effective steam-to-air radiator 4) smaller and lighter "steam" generator. At this pressure water does not boil and can absorb large amount of energy. Using vapor of alkali metalby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
"Steam Bird" 1988 Sci-fiction book by Hilbert Schenck, engineer who worked on steam condensers for the giant steam turbofan aircraft at Pratt&Whitney in early 1950s. That system was called supercritical water ducted blower propulsion. https://en.m.wikipedia.org/wiki/Hilbert_Schenck In this book, based on his real work, pilots are flying in a giant steam aircraft with 10 steam tby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Steam automobile or aircraft or hovercraft could work on a cheaper or free solid fuel. 1939 aircraft with woodgas generator burning 34 kg/75 lbs of charcoal per hour of flight at 120 mph. Steam aircraft engine could have comparable performance and weight.by novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Some interesting papers on steam automobile plant design and testing in 1970s: 1) Steam car control analysis https://nepis.epa.gov/Exe/ZyNET.exe/9101GQZT.TXT?ZyActionD=ZyDocument&Client=EPA&Index=Prior+to+1976&Docs=&Query=&Time=&EndTime=&SearchMethod=1&TocRestrict=n&Toc=&TocEntry=&QField=&QFieldYear=&QFieldMonth=&QFieldDay=&IntQFieldOby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Design and development of an automotive propulsion system utilizing a Rankine cycle engine (water based fluid). Final report Design, construction and testing of 150 hp SES automobile powerplant with fan cooled condenser and net efficiency 16% for a 1970s sedan. Also in this paper there is a concept of steam engine with net efficiency 31%: https://digital.library.unt.edu/ark:/67531/metadc109by novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
https://www.flightglobal.com/FlightPDFArchive/1942/1942%20-%200918.PDF#navpanes=0&scrollbar=0&page=1&view=FitH,0 ''News has now reached us that the Breguet Aircraft works at Toulouse is building an experimental jet-propelled machine to the designs of R.Leduc.This French engineer is well known for his work in connection with the problem of jet propulsion.As reported in the fourth aby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Besler's 1954 work on 4x200 hp steam engines STOL airplane: https://apps.dtic.mil/dtic/tr/fulltext/u2/051752.pdfby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
This is just a concept based on 1946 motorjet aircraft I-250 (MIG-13). But it can be any other propeller aircraft like P51 Mustang. Steam aircraft powerplant cannot compete with modern turbofan and turboprop engines and will be heavier than piston engine also. But at high speed and high altitude it works well if motorjet cycle is used. It may be interesting to design and build racing steamby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Working model of steam driven turbojet was built and tested by Nigel Copping in 1997. https://youtu.be/cLhvpWdq5rkby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Steam turbine powered turbojet or turboprop aircraft will not be able to compete with modern turbofan/turboprop aircrafts due to much higher weight and lower efficiency, but it can be used in air racing or to achieve speed record. Great deal of research on steam aircraft powerplants was done in 1950s. It is suprising that no one tried to build functional steam aircraft using modern materials andby novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Here is the summary of the calculation method. The design steam pressure is 5000-1000 psi which is quite high. More practical is probably 1500-2000 psi and 1000-1200 F steam. Engine design speed is 600 mph/Mach 0.9 at 45,000 ft. Static sea level thrust of such engine per hp of steam turbine is rather low because the steam generator is rated for the cruise power due to weight limitations.by novice - SteamStuff
Re: Steam turbine driven turbojet - 5 years ago
Here is a calculation of the steam jet engine aircraft from the 1952 study "Basic performance characteristics of the steam turbine-compressor-jet aircraft cycle" by A. Fraas and G.Cohen. Results are showing that this concept is feasible.by novice - SteamStuff
Steam turbine driven turbojet - 5 years ago
There are several interesting steam turbines powered aircraft projects from 1930-1970s. https://digital.library.unt.edu/ark:/67531/metadc58164/m2/1/high_res_d/19930085809.pdf Calculated condenser performance for a steam turbine power plant for aircraft ( 5000 hp steam turbines, 500 mph at 30,000 ft, total cycle efficiency 10-15%). https://digital.library.unt.edu/ark:/67531/metadc52887/mby novice - SteamStuff