{
  "$type": "site.standard.document",
  "description": "A turbofan gas turbine engine comprises, in axial flow sequence, a heat exchanger module, a fan assembly, a compressor module, a turbine module, and an exhaust module. The fan assembly comprises a plurality of fan blades defining a fan diameter (D). The heat exchanger module is in fluid…",
  "path": "/patents/1411301",
  "publishedAt": "2023-12-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01D17/14",
    "ROLLS ROYCE PLC [GB]"
  ],
  "textContent": "A turbofan gas turbine engine comprises, in axial flow sequence, a heat exchanger module, a fan assembly, a compressor module, a turbine module, and an exhaust module. The fan assembly comprises a plurality of fan blades defining a fan diameter (D). The heat exchanger module is in fluid communication with the fan assembly by an inlet duct, and the heat exchanger module further comprises a plurality of radially-extending hollow vanes arranged in a circumferential array, with a channel extending axially between adjacent hollow vanes. Each of the hollow vanes accommodates at least one heat transfer element for the transfer of heat from a first fluid contained within the or each heat transfer element to a corresponding vane airflow passing through the hollow vane and over a surface of the or each heat transfer element. Each of the hollow vanes further comprises a flow modulator. The flow modulator is configured to actively regulate the vane airflow as a proportion of a total airflow entering the heat exchanger module in response to a user requirement.",
  "title": "A HEAT EXCHANGER"
}