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  1. Toymaker

    DIY Tesla Impulse Turbine

    Thank you much for finding this info :),....very encouraging !! But now I don't know whether to be happy that I'm likely on the right path, or sad, that I'm not the first crazy person to think of this idea.
  2. Toymaker

    DIY Tesla Impulse Turbine

    I had the same thoughts initially, that surely the higher tangential speeds were for impellors pumping gases,...but on second thought, I couldn't recall ever seeing a closed centrifugal impellor used for gases, and multiple articles cited the 360 m/s limit for closed impellors.
  3. Toymaker

    DIY Tesla Impulse Turbine

    You are correct :) As to where the blower goes,...the air blower will be powered by one of two different steam driven turbines. Depending on how successful my Tesla-impulse turbine turns out to be, I will either build a larger one, matched in size to use the max steam output of my boiler, or...
  4. Toymaker

    DIY Tesla Impulse Turbine

    The centrifugal air blower (aka leaf blower) blows fresh air into the combustion chamber. A separate swashplate air pump supplies 3 to 20 psi air pressure to the venturi effect fuel nozzle.
  5. Toymaker

    DIY Tesla Impulse Turbine

    I did a bit of Googling and found that covered impellors are used up to 360 m/s, and open impellors, like mine, are used up to 500 m/s. From what I was able to find, it seems max tip speed for water pumps is limited by material strength of the impellor; 50 m/s for cast iron impellors and...
  6. Toymaker

    DIY Tesla Impulse Turbine

    OK, I ran the numbers on my tiny DIY water pump first using the simple equations Gemini (Google’s AI) found, and then using the step-by-step equations described in the link you provided. The results from Gemini's equations are more-or-less reasonable, but the results from the Euler’s...
  7. Toymaker

    DIY Tesla Impulse Turbine

    All the pumps you've mentioned are positive displacement,... beyond that, I'm not qualified to answer your other questions. However, there must be a few good reasons we don't see these pumps used in home-use pressure washers; sealing issues, expensive to hold needed tolerances, work great with...
  8. Toymaker

    DIY Tesla Impulse Turbine

    Thanks for the link,...but can you tell me what ρ is? I'm assuming it's the mass density of water, 1000kg/m^3, but it's not defined in the linked text.
  9. Toymaker

    DIY Tesla Impulse Turbine

    Thank you Gemini (Google's AI), for finding the flow rate equation I've been looking for. The flow rate of a centrifugal pump impeller can be determined using the following equation: Q = π * D * B * ω / 60 where: Q is the flow rate (in cubic meters per hour) π is a mathematical constant...
  10. Toymaker

    DIY Tesla Impulse Turbine

    As always, I appreciate your concerns for my safety,...and you and I, along with other HMEM members, have already spent much time and many posts discussing the safety of my monotube boiler, so I will not re-address any specific issues here. I will only point out, again, that many SACA (Steam...
  11. Toymaker

    DIY Tesla Impulse Turbine

    I will measure the rpm of the turbine once I connect it to my boiler. For now, I've estimated free running rpm will be aprox 160,100,...this number is based on the assumption that linear velocity at the turbine disk's circumference (ie tip speed) will equal steam velocity from the nozzles which...
  12. Toymaker

    DIY Tesla Impulse Turbine

    Do you have an equation to calculate flow rate through a centrifugal water pump which includes impeller blade height or thickness?
  13. Toymaker

    DIY Tesla Impulse Turbine

    You've made an understandable assumption, but the real reason for the calculations is slightly more complicated and best explained by referencing my post #633 in the "Monotube Flash Boiler" thread where I stated: I will need a MUCH bigger alternator coupled to the turbine to perform useful...
  14. Toymaker

    DIY Tesla Impulse Turbine

    If you review post #2, you'll see the below photo showing the current water pump attached to the Tesla turbine which is itself connected to my shop air compressor tank for initial testing. The pump and turbine share a common shaft because they were both designed to work together from the start...
  15. Toymaker

    DIY Tesla Impulse Turbine

    Due to the small diameter of the impeller, tip speed is only 255 meters per second, which is well under the 343 m/s speed of sound in water. My knowledge of impeller design is mostly with compressible fluids; in air, as long as tip speed is kept below Mach 1, the impeller will likely work. I...
  16. Toymaker

    DIY Tesla Impulse Turbine

    Yep,... seems I'm at the point where I need to run a test to determine actual results. My current plan is to plumb the pump the same way as a pressure washer, directing the pump's output through a very small orifice while reading the pressure with a dial guage. The pump input will be...
  17. Toymaker

    DIY Tesla Impulse Turbine

    I've been attempting to calculate how much power my small centrifugal water pump will use when driven by my Tesla Impulse turbine, but I have failed to find all the equations I need. Here's what I have so far: The power needed to drive centrifugal pump is as follows: Power (kW) = Q x P x SG /...
  18. Toymaker

    Monotube Flash Boiler Design

    Ooops,...I just had an epiphany !! Back in May of this year I was brainstorming ideas of how to test power output of both my boiler and my Tesla-Impulse turbine. Thinking what I believed to be conservatively at that time, I decided that using my 1/2 KW spindle motor as a generator coupled to...
  19. Toymaker

    Monotube Flash Boiler Design

    Lets make a little steam !! It's been 4 months since I last fired-up the burner and had the boiler making steam, and this is the first time I'm using my DIY feed pump, so I'm taking baby steps as I ease back into running my monotube steam generator. These first tests are primarily to check the...
  20. Toymaker

    Monotube Flash Boiler Design

    My DIY 9 Piston Feed Pump is finally finished and I've begun using it to produce pressure in the boiler (without firing up the burner) which allows me to adjust the software that reads the feed pump pressure and boiler pressure output sensors, which are both displayed on the LCD. Below are two...
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