Stable pumped two-phase cooling

An aircraft cooling system comprising:

• a plurality of aircraft heat loads;
• and
• cooling system comprising:
• a cold sink comprising a plurality of heat load cooling paths, wherein each heat load cooling path is associated with one of the plurality of aircraft heat loads;
• an inlet configured to supply a cooling fluid into the cold sink;
• an outlet configured to receive the cooling fluid after passing through the plurality of heat load cooling paths of the cold sink;
• and
• a pressure regulating element arranged along each heat load cooling path, each pressure regulating element arranged between the inlet and the heat load along each heat load cooling path and configured to cause a pressure drop in the cooling fluid prior to passing the cooling fluid to each heat load,
• wherein the pressure drop caused by each pressure regulating element is the same and is a pressure drop greater than a maximum pressure drop across each heat load of a system without such pressure regulating elements.

A cooling system comprising:

• a cold sink comprising a plurality of heat load cooling paths;
• a heat load associated with each heat load cooling path of the plurality of heat load cooling paths;
• an inlet configured to supply a cooling fluid into the cold sink;
• an outlet configured to receive the cooling fluid after passing through the plurality of heat load cooling paths of the cold sink;
• and
• a pressure regulating element arranged along each heat load cooling path, each pressure regulating element arranged between the inlet and the heat load along each heat load cooling path and configured to cause a pressure drop in the cooling fluid prior to passing the cooling fluid to each heat load,
• wherein the pressure drop caused by each pressure regulating element is the same and is a pressure drop greater than a maximum pressure drop across each heat load of a system without such pressure regulating elements,
• wherein the cooling fluid is a liquid at the inlet and a two-phase fluid at the outlet, and
• a separator arranged downstream from the outlet and configured to receive the cooling fluid and separate such fluid into a liquid flow path and a vapor flow path, wherein each of the liquid flow path and a vapor flow path define a closed-loop system centered on the cold sink.