Combustor liner assembly with enhanced cooling system

A combustor liner assembly comprising:

• an outer tubular member having an outer peripheral surface and an inner peripheral surface;
• an inner tubular member having an outer peripheral surface and an inner peripheral surface;
• and
• a middle band including a plurality of undulations defining alternating peaks and valleys, the middle band being operatively positioned between the inner and outer tubular members such that a plurality of cooling passages are formed therebetween;
• and
• a turbulence generator provided along at least one of the cooling passages, the turbulence generator being formed by the middle band, whereby the turbulence generator causes disruptions in the flow of fluid along the cooling passage, the turbulence generator extending generally radially inward from a portion of one of the peaks of at least one of the undulations such that a bottom of the turbulence generator and the valleys contact the outer peripheral surface of the inner tubular member, wherein the peaks contact the inner peripheral surface of the outer tubular member, wherein the surface area of the middle band that is in contact with the inner tubular member is greater than the surface area of the middle band that is in contact with the outer tubular member.