| 摘要 |
A heat exchanger comprises at least one first conduit section (108, fig 15) suitable for the flow of a first fluid in heat exchange with a second fluid in a flow path which passes the at least one first conduit section. At a first location the at least one first conduit section is mounted on a support 84, and the at least one conduit section at a second location is moveable relative to the support in response to thermal change. The first conduit section may comprise a plurality of tubes (120) extending between an inlet header (106) to an outlet header (110), and an intermediate header (440) is provided in the flow path therebetween. The inlet header may be fixed to the support and the outlet header may be moveable in response to thermal change. The support is capable of accepting high radially inward load and includes at least one circular ring 86, 88 in a cylindrical perforated drum structure, longeron members 90 and X-shaped bracing 104. The first conduit section may comprise spiral sections that spiral inside one another. The heat exchanger may be used in a vehicle engine for an aircraft or orbital launch vehicle. |
