From: earlcp@idirect.com   
      
   "toby"  :   
      
   > Sure, this is how I understood it.  I just wondered if the added water in ,   
   > what   
   > I now know to be called power boost fluids (thanks Cameron), would allow   
   > one to reach stoichiometric combustion without hitting these temperatures.   
   > As it seems that it is this temperature constraint which prevents   
   > the engine from generating even more thrust.   
   >   
   > If we are aiming at maximum thrust regardless of efficiency then we need to   
   > add as much energy as possible. Unfortunately, with conventional fuels this   
   > results in these intolerably high temperatures. The whole point of this   
   > question is   
   > to find out whether it would be possible to utilise all the available   
   oxygen   
   > by   
   > absorbing this excess heat in the creation of super-heated steam from the   
   > water   
   > dilutent. Or, alternatively, whether it would be more effective to absorb   
   > this excess   
   > heat by running very FUEL RICH, with the water dilutent  absorbing the   
   extra   
   > heat by   
   > 'steam reforming' the unburnt hydrocarbons. The second method might be   
   > better   
   > as it would produce an exhaust with a lower average molecular mass. And   
   > produce   
   > a cool fiery tail!   
      
   Now that I get the idea about what you are looking for may I suggest that you   
   also read the logs for the last year's work on Armadillo Aerospace's website.   
     There water has been added to a monopropellant (H2O2 + Alcohol) to:   
      
   a) Lower the burn temperature to enable to use of COTS material to built the   
   engines with.   
      
   b) To remove the explosive character of an high energy monopropellant.   
      
   c) To make manual handling easyier/safer.   
      
   I don't know if your idea of steam reforming from the extra water matters in   
   a H2O2 design but it does help in understanding why H2O2 design are as good   
   as they are.   
      
             Earl Colby Pottinger   
      
   PS. http://www.armadilloaerospace.com/   
      
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