TY - JOUR
AU - Zakira, E. S.
AB - To experimentally determine the coefficient of friction resistance on a large-scale bench, tests of collapsible plate heat exchangers (HE) of two standard sizes with plate packs of three types (five configurations in total) were carried out, differing in the angle of inclination of the chevron surface of the plates. Water was used as the heat carrier during the tests. The dependence of the friction drag coefficient on the Reynolds number and the value of the critical Reynolds number corresponding to the transition from laminar to turbulent flow are obtained. A difference of up to several times in the experimental values of the friction drag coefficient for the same tested HE model at close Reynolds numbers was found. The obtained data were divided into two groups, which included similar values of the coefficient of friction resistance. It is concluded that a significant scatter of the experimental data is due to the elastic deformation of the plates caused by the pressure drop between the heat-exchanger circuits. Due to the introduction of the deformation coefficient, the dependence of the friction resistance coefficient on the Reynolds number was refined, which showed good convergence of the results obtained, combined into one group. The refined algorithm for processing experimental data made it possible to determine the coefficients and exponents included in the criterion formulas for calculating the friction resistance in the transitional and turbulent flow regimes. For each HE configuration, the values of the critical Reynolds number have been refined. The dependence of elastic deformation on the size and type of corrugation of the chevron surface has not been established. The alleged cause of the deformation, identified after disassembling the tested models, is the different depths of stamping of the chevron surface and the mechanical deformation limiter.
TI - Experimental Investigation into the Effect of Elastic Deformation of Plates on the Friction Resistance of Plate Heat Exchangers
JF - Thermal Engineering
DO - 10.1134/s0040601522070047
DA - 2022-08-01
UR - https://www.deepdyve.com/lp/springer-journals/experimental-investigation-into-the-effect-of-elastic-deformation-of-cBtoU1DSiE
SP - 596
EP - 600
VL - 69
IS - 8
DP - DeepDyve
ER -