A process for the continuous production of thin-walled, radially closed hollow profiles which are composed of nonferrous metals and have a small cross section comprises supply of a flat strip of the nonferrous metal to a forming apparatus (212) at a first supply speed, where the thickness of the strip corresponds to the wall thickness of the hollow profile. The forming apparatus (212) is configured for continuous forming of the flat strip supplied into a shape corresponding to the hollow profile. After forming, two opposite edges of the flat strip rest flush against one another in a contact region. A welding apparatus (216) continuously welds the edges which rest flush against one another by means of a laser which emits light having a wavelength of less than 600 nm. The laser heats a point in a welding region which has a diameter which is less than 20% of the cross-sectional dimension of the hollow profile. The welded hollow profile is taken off from the welding region, provided in a corrugator (225) is with parallel or helical corrugation in sections and taken up in an uptake device (226).

Heat exchangers, heat exchanger systems, and hypersonic vehicles are provided. For example, a heat exchanger is provided that comprises a first chamber for receipt of a flow of cool fluid and a second chamber for receipt of a flow of hot fluid. The heat exchanger further comprises a buffer fluid flowpath for circulation of a buffer fluid therethrough. The buffer fluid circulates within the buffer fluid flowpath disposed between the first chamber and the second chamber to transfer heat from the hot fluid to the cool fluid. In certain embodiments, a hypersonic vehicle comprises such a heat exchanger, and the cool fluid is cryogenic or near-cryogenic fuel of the hypersonic vehicle and the hot fluid is engine bleed air from a hypersonic propulsion engine of the vehicle.

A high-temperature flow-splitting component, applicable to a temperature range from a first temperature to a second temperature, includes an entrance channel, at least one primary channel and at least one subordinate channel. The entrance channel is used for introducing a fluid at a total flow rate. The at least one primary channel for introducing the fluid from the entrance channel at a first flow rate is connected with the entrance channel by a first angle ranging from 90°˜270°. The at least one subordinate channel for introducing the fluid from the entrance channel at a second flow rate is connected with the at least one primary channel by a second angle ranging from 30°˜150°. A sum of the first flow rate and the second flow rate is equal to the total flow rate.

A heat exchanger includes a plurality of heat exchange tubes arranged into a first row of tubes and a second row of tubes. A fixed mount fixedly positions the first row of tubes, and a movable mount makes the second row of tubes movable between an aligned position in which tubes in the second row are aligned with tubes in the first row, creating a linear flow path for the fluid through the tubes, and a non-aligned position in which tubes in the second row are not aligned with tubes in the first row, creating a curvilinear flow path for the fluid through the plurality of tubes. Heat is exchanged between the first fluid and a second fluid passing through the plurality of heat exchange tubes. The heat exchanger may be employed as an HRSG in a combined cycle plant, among other applications.

The invention relates to a heat exchanger (1), in particular for heating up, heating and/or evaporating a fluid, said heat exchanger (1) comprising a heat exchanger tube (2) and a plurality of tubes (10) penetrating the heat exchanger tube (2) and being spaced apart from each other, wherein the heat exchanger tube (2) has double the number of openings (5, 6) based on the number of tubes (10), wherein each tube (10) is guided through two of these openings (5, 6), and wherein the tubes (10) are connected to the heat exchanger tube (2) on both sides via their end tube sockets (11, 12).

This flat tube heat exchanger encompasses a closed housing, in which two tube sheets and a tube bundle, which is arranged between the tube sheets and which is supported by the tube sheets is arranged. The tube bundle comprises at least some flat tubes, which extend in longitudinal direction of the tube bundle. At their ends, the flat tubes are round and are flat in a central section. The ends of the flat tubes, which have a round cross section, can be circular or can encompass a different round shape.

A heat exchanger for an oxygenator comprises multiple tube sections, each having a longitudinal tube axis, wherein the tube sections are disposed as a bundle having a longitudinal bundle axis, and the tube sections are connected to each other in at least one connecting section of the bundle by joining by way of chemical and/or physical bonded joints. A method for producing the heat exchanger is also provided.

A duct for a turbine engine, such as a gas turbine engine, can be utilized to carry a fluid from one portion of the engine to another. The duct can include a metallic tubular element having one of a varying wall thickness, a varying cross section, or a tight bend. Such a duct can be formed utilizing additive manufacturing or metal deposition on an additively manufactured mandrel.

Heat exchanger fins and heat exchangers are disclosed. The heat exchanger fins disclosed herein comprise louvers and winglet-type vortex generators arranged to improve heat transfer efficiency.

A heat exchanger with a plurality of flow path assemblies disposed in a core body, a first and a second core surface of the core body provided with a plurality of throughholes. Each throughhole on the first and the second core surface mated individually with a flow path assembly seat, a coupling means providing independent positioning as well as longitudinal axial orientation means to each of the flow path assembly disposed in the core body, wherein each flow path assembly seat provided on the first core surface engages a first tubular section of a corresponding flow path assembly, while each flow path assembly seat provided on the second core surface engages a second tubular section of a corresponding flow path assembly. Each flow path assembly provided with at least one chamber section, each chamber section having a medium directing component disposed within for a desired medium flow effect.