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UDC 628.311

Yegorov N. L., Loitzker Oskar

The effect of shortening the feed section of Venturi flume on the error of measuring the liquid flow rate

Summary

The use of flow meters with Venturi flumes for measuring the flow rate of effluent before discharge into the water reservoir or of wastewater transported to the treatment facilities is reported. The new construction projects boost the flow of wastewater; the level of the upstream water rises, the relative length of the feed section expressed in upstream maximum depth units decreases and does not meet the regulatory requirements any longer. When the similar situation occurs in the throat of the pressure flumes the flow meters are admitted to service however with a higher effluent coefficient error. The procedure of estimating a complementary error at the reduction of the relative feed section length in case of measuring the liquid flow rate with Venturi flumes is suggested.

Key words

measurement error , wastewater , flow rate measurement , Venturi flume , throat