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Post by turboron on Jan 16, 2020 7:19:00 GMT -5
Michael, a couple of techniques I use will get you in the ballpark.
I measure the compressor discharge temperature with a hand held laser thermometer on the Outer Combustion Case (OCC). The OCC is the pressure vessel around the flame tube. The laser thermometer are cheap and readily available.
I calculate an air flow using the propane fuel flow. All you need to do is measure the fuel gas supply pressure and the compressor discharge pressure. The pressure difference is use to calculate a fuel flow using the orifice size and the number of orifices in the fuel nozzle. The airflow is estimated the relationship that fuel flow pounds per hour is equal to the airflow pounds per minute on our 60/1 air/fuel ratio DIY gas turbines. A check on the air flow is multiplying the compressor inducer area in square inches by 11 pounds per minute airflow per square in inducer area.
Thanks, Ron
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