Abstract: A method and apparatus are presented. An active flow control system comprises a flow control valve, a manifold, and a temperature control system. The flow control valve is configured to control a flow of air into the manifold. The manifold is operatively connected to a number of actuators. The temperature control system is configured to heat at least a portion of the flow of air.

Abstract: A method for aligning and joining a first structure to a second structure in an aircraft is provided. A spacer system having a shape memory alloy is positioned in a gap between the first structure and the second structure. The shape memory alloy is initially in a cooled state. A temperature of the shape memory alloy is increased such that the shape memory alloy changes from the cooled shape to a heated shape to fill the gap and apply a load to hold the first structure in place relative to the second structure. Additional processes may then be performed to join the first structure to the second structure.

Abstract: A method for aligning and joining a first structure to a second structure in an aircraft is provided. A spacer system having a shape memory alloy is positioned in a gap between the first structure and the second structure. The shape memory alloy is initially in a cooled state. A temperature of the shape memory alloy is increased such that the shape memory alloy changes from the cooled shape to a heated shape to fill the gap and apply a load to hold the first structure in place relative to the second structure. Additional processes may then be performed to join the first structure to the second structure.

Abstract: A method and apparatus are presented. An active flow control system comprises a flow control valve, a manifold, and a temperature control system. The flow control valve is configured to control a flow of air into the manifold. The manifold is operatively connected to a number of actuators. The temperature control system is configured to heat at least a portion of the flow of air.

Abstract: A method and apparatus are presented. An active flow control system comprises a flow control valve, a manifold, and a temperature control system. The flow control valve is configured to control a flow of air into the manifold. The manifold is operatively connected to a number of actuators. The temperature control system is configured to heat at least a portion of the flow of air.

Abstract: A method and apparatus are presented. An active flow control system comprises a flow control valve, a manifold, and a temperature control system. The flow control valve is configured to control a flow of air into the manifold. The manifold is operatively connected to a number of actuators. The temperature control system is configured to heat at least a portion of the flow of air.

Abstract: Concepts and technologies described herein provide for the creation of an actuating fluid flow utilizing a multi-stage actuator. According to one aspect of the disclosure provided herein, a fluid actuation system includes at least two stages, each stage having a plenum and one or two diaphragms acting on the plenum to create an actuating fluid flow. The diaphragms of each stage may be substantially aligned along an axis. The actuating flow is aggregated between stages and expelled into a fluid flow to be controlled. According to various aspects, the diaphragms may include piezoelectric discs.

Abstract: A launch vehicle comprising a casing, a solid propellant, a channel, a geometric feature, and a suppression structure. The solid propellant is located within the casing. The channel is through the solid propellant, and the geometric feature is in the channel. The suppression structure is located around a centerline for the channel and located upstream in a flow path from the geometric feature.

Abstract: Concepts and technologies described herein provide for the creation of an actuating fluid flow utilizing a multi-stage actuator. According to one aspect of the disclosure provided herein, a fluid actuation system includes at least two stages, each stage having a plenum and one or two diaphragms acting on the plenum to create an actuating fluid flow. The diaphragms of each stage may be substantially aligned along an axis. The actuating flow is aggregated between stages and expelled into a fluid flow to be controlled. According to various aspects, the diaphragms may include piezoelectric discs.

Abstract: A launch vehicle comprising a casing, a solid propellant, a channel, a geometric feature, and a suppression structure. The solid propellant is located within the casing. The channel is through the solid propellant, and the geometric feature is in the channel. The suppression structure is located around a centerline for the channel and located upstream in a flow path from the geometric feature.