Abstract: A shroud system provides stress management for thermal gradients and compliance. The shroud system includes a support structure having an annular shape and defining a shroud cavity. A shroud is disposed, at least partly, in the shroud cavity. A rotor is rotatable about an axis and within the shroud. The shroud includes a body that has a first surface facing the rotor and a second surface facing away from the rotor. The shroud includes a pair of rails that are parallel to each other and that are spaced apart from each other. The rails extend from the second surface. The body has a thickness in a radial direction, and the thickness is less than a minimum compliance limit. The pair of rails provide stiffness to the shroud to enable the thickness of the body to be less than the minimum limit.

Abstract: A turbomachine includes a shroud and a rotor, which includes first and second blades. A first blade tip and a second blade tip respectively include a base and a first layer. The second blade tip also includes an abrasive second layer layered over the respective first layer. The first layer has a lower material hardness than the shroud. The second layer has a lower thermal stability than the shroud and the first layer. The rotor performs a grind operation and, subsequently, a post-grind operation. The second layer, in the grind operation, contacts and removes material from the shroud, and wears away, thereby revealing the first layer of the second blade tip for the post-grind operation. The first layer of the first blade tip is spaced apart with at least some radial clearance from the shroud in the grind and post-grind operations.

Abstract: A turbomachine includes a shroud and a rotor, which includes first and second blades. A first blade tip and a second blade tip respectively include a base and a first layer. The second blade tip also includes an abrasive second layer layered over the respective first layer. The first layer has a lower material hardness than the shroud. The second layer has a lower thermal stability than the shroud and the first layer. The rotor performs a grind operation and, subsequently, a post-grind operation. The second layer, in the grind operation, contacts and removes material from the shroud, and wears away, thereby revealing the first layer of the second blade tip for the post-grind operation. The first layer of the first blade tip is spaced apart with at least some radial clearance from the shroud in the grind and post-grind operations.