Nomenclature:

 

Files ending in TMP

Indicate the temperature distribution in the cylinder.

 

D100G0L85TMP means:

D     = HFO  and is 100%

G     = Gas  and is    0%

L      = Load and is  85%

T     = Temperature - use color code to determine temperature.

 

When gas is "0%" as above, we denominate it as the base case.

 

D50G50L85TMP means:

D     = HFO   and is   50%

G     = Gas   and  is   50%

L      = Load   and  is   50%

TMP = Temperature- use color code to determine temperature.

 

Files ending in CH4:

Indicate the concentration of fumigated natural gas in the intake air within the

cylinder. The label indicates mass fraction (also known as concentration).

 

 

 

D100G0L85TMP

Base case: D/HFO operation only at 85% Load.

When movie is played you witness initially: a) compression stroke as the air is compressed until TDC. As the compression takes place you will observe the temperature changing. Use the color code to determine temperature. Subsequently after compression stroke  you will observe b) At TDC, the HFO is injected and combustion takes place. You observe the flame establish and then it spreads pushing the piston back. c) The piston moving back (down) is the expansion stroke. You will observe that there is no more defined flame but combustion gas filling the cylinder. The action of the exhaust which squishes it out is not shown here. After this you will see the piston coming to rest .

 

D50G50L85TMP

Dual Fuel - 50% HFO - 50% Gas at 85 Load

In comparison with the base case - the difference in flame size  and temperature distribution will be observed quite clearly. The flame is smaller as expected. More importantly, there is no flame run-away, detonation, premature spreading, etc. with dual fuel at 50%-50% and Load of 85%. This clearly evidences that there are no adverse effects by converting this engine to dual fuel at the indicated load and operating condition.

 

D100G0L50TMP

Base case: D/HFO operation only at 50% Load

When movie is played you witness initially: a) compression stroke as the air is compressed until TDC. As the compression takes place you will observe the temperature changing. Use the color code to determine temperature. Subsequently after compression stroke  you will observe b) At TDC, the HFO is injected and combustion takes place. You observe the flame establish and then it spreads pushing the piston back. c) The piston moving back (down) is the expansion stroke. You will observe that there is no more defined flame but combustion gas filling the cylinder. The action of the exhaust which squishes it out is not shown here. After this you will see the piston coming to rest .

 

D50G50L50TMP***

Dual Fuel- 50% HFO - 50% Gas at 50% Load.

In comparison with the base case - the difference in flame size  and temperature distribution will be observed quite clearly. The flame is smaller as expected. More importantly, there is no flame run-away, detonation, premature spreading, etc. with dual fuel at 50%-50% and Load of 85%. This clearly evidences that there are no adverse effects by converting this engine to dual fuel at the indicated load and operating condition.

 

D100G0L50CH4 ********

Concentration of fumigated natural gas in the intake air within the cylinder.

Initially very high (red) and after compression takes place goes to the TDC then

after combustion, the concentration reduces.

 

D50G50L85CH4*******

Concentration of fumigated natural gas in the intake air within the cylinder.

Initially very high (red) and after compression takes place goes to the TDC then after combustion, the concentration reduces.