Combustion comprehensive experimental platformLet students observe the tempering and blow off phenomena of premixed flames, determine the stable concentration limit of premixed flames, quantitatively measure the influence of fuel concentration on flame propagation stability, and draw the flame stability curve (flashback line). Compare the similarities and differences between jet diffusion combustion and premixed combustion. Observe the Burk Schumann flame phenomenon. Measure the temperature distribution of jet flames. Measure the relationship curve between laminar diffusion flame length and fuel volume flow rate.
Experimental function:
1. The ring top effect, wall quenching effect, and flame protrusion effect of Bensun flame; The influence of fuel concentration on flame color; The influence of airflow velocity on flame shape and various flame phenomena.
2. The principle and method of separating the inner and outer cones of the flame of the Bunsen burner.
3. Observe the tempering and blow off phenomena of premixed flames, determine the stable concentration limit of premixed flames, quantitatively determine the influence of fuel concentration on flame propagation stability, and draw the flame stability curve (flashback line).
4. Compare the similarities and differences between jet diffusion combustion and premixed combustion.
5. Observe the Burk Schumann flame phenomenon.
6. Measure the temperature distribution of the jet flame.
7. Determine the relationship curve between laminar diffusion flame length and fuel volume flow rate.
8. Provide a method for measuring flame propagation speed (volume of combustible mixture burned per unit flame area per unit time) using static pressure method (tube method); The relationship between flame propagation speed u0, flame propagation speed up, and incoming flow (gas supply) speed us The effect of excess air coefficient (i.e. air consumption coefficient) on flame combustion temperature.
Main configuration and technical requirements:
1. This experimental system should include the main body of the experimental platform and its ancillary systems. The main body should include the shell, stabilizing cylinder, air system, gas system, cooling water system, organic glass windshield, igniter, pressure controller, manual needle valve, and pressure, flow, temperature measuring instruments, etc.
2. The shell and pressure stabilizing cylinder of the main body are made of 304 stainless steel material; Stainless steel pipes or copper pipes, as well as high-end stainless steel connecting fittings, are selected as the connecting materials; The experimental glass tube is made of quartz glass and the windshield is made of organic glass, including reserved external system interfaces.
3. The pressure controller and manual needle valve are made of stainless steel or cast aluminum materials, and the pressure parameters can be adjusted and controlled within the range of 0-0.25Mpa.
4. Each device is equipped with 5 pressure gauges selected from different specifications of stainless steel bellows pressure gauges, with ranges of 1kPa, 6kPa, 60kPa, 60kPa, and 250kPa.
5. Each device is equipped with 3 rotor flow meters, with adjustable flow ranges of 0-20 liters/hour, 0-600 liters/hour, and 0-4000 liters/hour, respectively.
6. Platinum rhodium platinum thermocouples and digital secondary instruments are used for temperature measurement, with a temperature measurement range of 0-1200; Stainless steel height gauge 0-0.2 meters.