Experimental Setup
Experimental Procedure
- The CCD camera has to be positioned at a distance where the flame of maximum height can be captured. The camera should be aligned perpendicular to the front plane of the flame.
- Once the camera position is fixed, it should not be disturbed or moved to a new position in order to avoid variable magnification.
- CNG fuel is set to the desired flow rate using calibrated rotameter and ignited at the tube exit.
- At a particular fuel flow rate, video of the flame should be taken for certain time.
- This procedure is repeated for different fuel flow rates.
- The time period of video for each flame should be kept constant in order to extract equal number of frames from the videos.
Precautions
- Ensure that the fuel line is leak proof.
- Experiments should be conducted in a ventilated room.
- Keep a fire extinguisher near the experimental setup.
- Switch on the exhaust fan before conducting experiments.
- Ensure that the control valves are functioning properly.
- The fuel flow rate has to be set to a minimum value initially using the control valve and ignited at the burner exit with the help of an igniter.
- The fuel supply has to be stopped when the fuel jet is not getting ignited for a considerable time. Then the burner should be purged with air to avoid accumulation of unburnt fuel.
