Abstract:
A method is provided for additive manufacturing. This method includes monitoring a current to a recoater blade. The monitored current is compared to a predetermined current. An operation is initiated in response to the monitored current exceeding the predetermined current. Another method for additive manufacturing includes comparing a movement of a recoater blade to an expected movement. A single exposure sequence is initiated in response to movement of the recoater blade being different than an expected movement. An additive manufacturing system is also provided which includes a recoated blade and a control. The control is operable to identify resistance to movement of the recoater blade.
Abstract:
A tube assembly that may be for a fuel nozzle (20) of a fuel system of a gas turbine engine may have a first tube (56) defining a first flowpath (59) along a centerline (52), a second tube (58) generally spaced radially outward from the first tube (56) with a first void (60) located between and defined by the first and second tubes (56, 58), and a support structure (68) located in the first void (60) and extending between the first and second tubes (56, 58). The support structure (68) is constructed and arranged to minimize or eliminate thermal conduction between the tubes (56, 58). The entire assembly may be additive manufactured as one unitary piece. One example of a method of operation may include designed-for breakage of the structural support (68) due to thermal stresses thereby further minimizing thermal conduction between tubes (56, 58).
Abstract:
In various embodiments, a fuel injector (120; 220; 320; 530; 630) may comprise a fuel nozzle (230; 330; 430) and a pilot stage (252; 350). The fuel nozzle (230; 330; 430) may define a main fuel channel (231; 534), a secondary fuel channel (233; 536), a simplex fuel channel (235; 538) and a heat shield area (232). The main fuel channel (231; 534) may be disposed about at least a portion of the simplex fuel channel (235; 538). The secondary fuel channel (233; 536) may be disposed about at least a portion of the simplex fuel channel (235; 538). The heat shield area (232) may be configured to separate and protect the fuel channels from a heat load to prevent fuel coking. The pilot stage (252; 350) may be operatively coupled to the fuel nozzle (230; 330; 430) and may be configured to receive fuel from the secondary fuel channel (233; 536) or the simplex fuel channel (235; 538). The main stage (242) may be operatively coupled to the fuel nozzle (230; 330; 430). The main stage (242) may be configured to receive fuel from the main fuel channel (231; 534).
Abstract:
A tool (100) includes a flexible section (102); a head (104) that extends form the flexible section (102); and an exciter (106) within the head (104). A method of additively manufacturing a component (20) including burrowing a tool (100) into a conglomerated powder (50) within an internal passage (22) of an additively manufactured component (20), the tool (100) vibrating in a manner to facilitate removal of the conglomerated powder (50).
Abstract:
A heat exchanger system for a gas turbine engine includes a plurality of fins 102; and an additively manufactured heat transfer tube 104 that extends through the plurality of fins, the additively manufactured heat transfer tube follows a non-linear path though said plurality of fins.
Abstract:
A method includes building a tubular object by a layer-by-layer additive manufacturing process. A structure integrally connected to the tubular object for supporting a portion of the tubular object is formed during building of the tubular object. The structure provides vibration dampening, heat shielding, heat transfer, stiffening, energy absorption, or mounting after the tubular object is built.
Abstract:
A tube assembly that may be for a fuel nozzle (20) of a fuel system of a gas turbine engine may have a first tube (56) defining a first flowpath (59) along a centerline (52), a second tube (58) generally spaced radially outward from the first tube (56) with a first void (60) located between and defined by the first and second tubes (56, 58), and a support structure (68) located in the first void (60) and extending between the first and second tubes (56, 58). The support structure (68) is constructed and arranged to minimize or eliminate thermal conduction between the tubes (56, 58). The entire assembly may be additive manufactured as one unitary piece. One example of a method of operation may include designed-for breakage of the structural support (68) due to thermal stresses thereby further minimizing thermal conduction between tubes (56, 58).