| 摘要 |
A method of measuring a flow rate of a first fluid 14 through a rotary seal 20 of a gas turbine engine comprising controlling a probe flow34 of a second fluid at an intra-seal cavity 22 and measuring a pressure change in the first fluid caused by the probe flow. Also provided is a gas turbine engine comprising a first cavity 10 and a second cavity 12, whereby during operation of the gas turbine engine the first cavity receives a first fluid at a first pressure and a second cavity receives a first fluid at a second pressure, the first pressure being higher than the second pressure. The rotary seal separates the first cavity from the second cavity, and comprises a first member 24, a second member 26 radially proximal to the first member, that rotates relative to the first member during operation of the gas turbine engine and an intra-seal cavity 22 formed between the first member and the second member. A probe flow control system is configured to control the probe flow of the second fluid at the intra-seal cavity and a sensor configured to measure a pressure change in the first fluid caused by the probe flow of the second fluid. |
