An experimental study of turbulent water flow through abrupt contractions was carried out in order to determine the detailed flow field. Wall static pressure measurements enabled the calculation of pressure loss coefficients for a range of contraction area ratios from 0.13 to 0.67 over a Reynolds number range of 40000–200000. The effect of variations in contraction sharpness was also established. Measurements of mean velocities and turbulence intensities were made using a two-component laser Doppler anemometer for one area ratio of 0.332 to establish the detailed flow features.
BullenP. R.CheesemanD. J.HussainL. A.RuffellA. E.The determination of pipe contraction pressure loss coefficients for incompressible turbulent flow. Int. J. of Heat and Fluid Flow, 1987, 8(2), 111–118.
2.
KhezzarL.WhitelawJ. H.Flow through round sudden contractions. Proc. Instn Mech. Engrs, Part C, 1988, 202(C4), 295–300.
3.
BullenP. R.HussainL. A.CheesemanD. J.Laser Doppler anemometry measurements of flow through a sudden pipe contraction and comparison with computer predictions. Third International Conference on Laser anemometry advances and applications, Swansea, 1989, paper C7.
4.
HussainL. A.The experimental and theoretical analysis of pipe contraction flow fields. PhD thesis, Kingston Polytechnic, 1990.
5.
ESDU. Pressure losses in flow through a sudden contraction of duct area. Engineering Sciences Data Unit, data sheet 89040, 1989.
6.
BlakeK. A.The design of piezometer rings. J. of Fluid Mechanics, 1976, 78, 415–428.
7.
BicanA. F.WhitelawJ. H.Refraction correction for LDA measurements in flows with curved optical boundaries. Imperial College report FS/81/17, 1981.
8.
GloverJ.BullenP. R.CheesemanD. J.The effects of refraction on the measurement of velocity of water flow in a circular pipe using a three beam laser Doppler anemometer system. Proceedings of Conference on Developments in measurements and instrumentation in engineering, Hatfield Polytechnic, 1985, pp. 59–72.
9.
BenedictR. P.CarlucciN. A.SwetzS. D.Flow losses in abrupt enlargements and contractions. Trans. ASME, J. of Engng for Power, 1966, 88, 73–81.
10.
Gerami-TajabadiH.The determination of pressure loss coefficients for an incompressible turbulent flow through pipe contractions. MPhil thesis, Kingston Polytechnic, 1985.
11.
BullenP. R.CheesemanD. J.HussainL. A.Technical note. Int. J. of Heat and Fluid Flow, 1988, 9(4).
12.
DurstF.LoyT.Investigations of laminar flow in a pipe with sudden contraction of cross sectional area. Computers and Fluids, 1985, 13(1), 15–36.
13.
LauferJ.The structure of turbulence in fully developed pipe flow. NASA report 1174, 1954.
