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Method and apparatus for stabilizing the flow coefficient for pitot-type flowmeters with a downstream-facing port

  • US 4,154,100 A
  • Filed: 01/09/1978
  • Issued: 05/15/1979
  • Est. Priority Date: 01/09/1978
  • Status: Expired due to Term
First Claim
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1. In a pitot tube type flowmeter for measuring differential pressures having a probe insertable into a stream of fluid flowing within a pipe, said probe including an upstream-facing surface against which said flowing fluid impacts and a downstream-facing surface located downstream of the latter containing a downstream-facing port for sensing the low pressure component of the measured differential, the improvement which comprises:

  • a pair of sharply contoured edges located in transversely-spaced relation on opposite sides of said probe intermediate said upstream and downstream-facing surfaces, said upstream-facing surface being contoured to divide the flow and direct essentially equal parts thereof across said sharply contoured edges, and said downstream-facing surface being shaped to continuously lie within the wake of the fluid flowing past the sharply contoured edges over a predetermined range of flow conditions.

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