Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

Thank you @Rahul.

@All.

Homogeneous simply means suppose if we put a pinch of salt in water it takes time to be dissolved completely once it is dissolved it is called homogeneous mixture but in the case of water and iron nail it is not dissoluble so it is a heterogeneous mixture.

Similarly in the case of diesel engine combustion process there is air which is compressed 40 to 50 bar is highly dense and diesel which is atomized and thrown with 100 to 200 bar into cylinder gets not mixed properly and meanwhile, combustion takes place.

And in the case of petrol engine, there is air and petrol previously mixed in carburettor which made it homogeneous and thrown into a cylinder with high pressure and combustion takes place when the piston moves from BDC to TDC.

No,

Homogenous means uniform composition throughout the mixture. Eg (air+ petrol vapor).

Non Homogenous means not uniform mixture.

Eg. (Hot air + atomized liquid diesel drops).

You mean to say that in SI engine a:f is 1:1.

1) Homogeneous means air and fuel mixed at same proportion, like 50:50.

2) Heterogeneous means either less or more.

What do you mean by homogeneous and heterogeneous?