Cold gas-dynamic spray nozzle

A nozzle for use with a particulate spray system comprising:

• a substantially linear input section having an inlet adapted for coupling to a heated gas supply line for the input of a heated gas, the input section having a longitudinal axis and defining an inner diameter for the passage therethrough of the heated gas;
• and
• a substantially linear output section in fluidic communication with the input section, the output section further including a particulate inlet and adapted for discharging a particulate spray toward a target surface, the output section having a longitudinal axis extending substantially perpendicular to the longitudinal axis of the input section and defining an inner diameter for the passage therethrough of the particulate spray,
• wherein the input section and the output section are formed as a single unitary piece having a convergent/divergent form.

A particulate spray system for the spraying of a particulate spray on an interior diameter of a tubular component or within a confined space, the system comprising:

• a gas heater including a gas inlet in fluidic communication with a heated gas supply line, the gas heater adapted for heating a gas passing therethrough the gas heater and supplying a heated gas to the heated gas supply line;
• a nozzle comprising:
• a substantially linear input section having an inlet adapted for coupling to the heated gas supply line for the input of the heated gas, the input section having a longitudinal axis and defining an inner diameter for the passage therethrough of the heated gas;
• and
• a substantially linear output section in fluidic communication with the input section, the output section further including a particulate inlet in fluidic communication with the heated gas for the input of a particulate material and adapted for discharging the particulate spray toward a target surface, the output section having a longitudinal axis extending substantially perpendicular to the longitudinal axis of the input section and defining an inner diameter for the passage therethrough of the particulate spray;
• and
• a powder feeder in fluidic communication with the particulate inlet of the nozzle for feeding a particulate material to the output section of the nozzle and into the flow of the heated gas passing therethrough.