The potential for improved performance of wave rotor cycles through the use of passage height variation is examined. A Quasi-one-dimensional CFD code with experimentally validated loss models is used to determine the flowfield in the wave rotor passages. Results indicate that a carefully chosen passage height profile can produce substantial performance gains. Numerical performance data are pres...

Continuous extradural analgesia by means of repeated doses of local analgesic drugs through a catheter placed in the extradural space is now widely used in this country, both for the production of surgical analgesia and for the relief of pain. Using the caudal route, labour can be conducted painlessly, and by simply increasing the dosage the analgesia can be extended to cover a Caesarean sectio...