Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

The open combustion chamber is the simplest form of chamber. It is suitable for only slow- speed, four-stroke cycle engines, but is widely used in two-stroke cycle diesel engines. In the open chamber, the fuel is injected directly into space on top of the cylinder. The combustion space, formed by the top of the piston and the cylinder head, usually is shaped to provide s swirling action of the air, as the piston comes up on the compression stroke. There are no special pockets, cells, or passages to aid the mixing of the fuel and air. This type of chamber requires a higher injection pressure and a greater degree of fuel atomization than is required by other combustion chambers to obtain an acceptable level of fuel mixing. To equalize combustion in the combustion chamber, use a multiple orifice-type injector tip for effective penetration. This chamber design is very susceptible to ignition lag.

Open combustion chamber mins inlet valve open to suction air and fuel-injected Combustion and the exhaust valve open remove black smoke.

The flow of fluid in a high velocity is called turbulent flow and this action is called turbulent effect.

Mixing of fluid randomly is called turbulent flow. It generally occur at higher velocity of fluid flow.

But in indirect combustion chamber more turbulant effect can be produce.

What is open combustion chamber? anyone explain.

What is turbulent effect?