Effect of flow-obstruction geometry on pressure drops in horizontal air-water flow

Experiments were carried out to investigate the pressure drop due to flow obstructions in horizontal air-water flow. The axial pressure distribution along a 25.4 mm inside diameter tube, with and without flow obstructions was measured using multi-tube manometers. Various obstruction shapes and sizes were investigated. Pressure-loss coefficients and two-phase multipliers were derived for twelve different flow obstructions.Estimates of the …