Research of the temperature effect on the viscosity of high-density kerosene for rocket engines

In the article examined questions of the analytical presentation viscosity-temperature characteristics of high-density kerosene for rocket engines during hydraulic calculations of processes refueling and transportation of rocket fuels. The first part of the article contains overview of the most common formulas for determining the Darcy friction factor. Was shown that when calculating the Darcy friction factor in Darcy-Weisbach equation, practically for all flow regimes and conduits of hydraulic friction, with the exception of the so-called Turbulent flow in Rough-pipe conduits the correctly choice of the values of the kinematic viscosity parameter included in the Reynolds number is essential when Fluid flow through pipelines. Finding the Darcy friction factor is necessary for calculating the friction loss pressure, as well as determining the flow rate. Was also carried out analysis of common formulas for the analytical presentation of viscosity-temperature characteristics of oil products. In the second part of the paper, part of the article contains the results of a research viscosity-temperature characteristics of high-density kerosene in accordance with GOST 10227 and GOST 12308 respectively grades T-1p/p and T-6. The values of the results of studies on the change in the kinematic viscosity values as a function of temperature are presented. As a result of the processing of the experimental data of the of the test samples, analytical dependencies are obtained that allow to determine the kinematic viscosity values of high-density kerosene grades T-1p/p and T-6 at a fixed temperature. The results of calculations of the kinematic viscosity based on the proposed dependences are compared, as well as using the Valter-ASTM and Reynolds-Filonov formulas with experimental data. The proposed dependences are in good agreement with the experimental data of the investigated samples and can be recommended for use in conducting hydraulic calculations of processes refueling and transportation of rocket fuels. © 2021, Univelt Inc. All rights reserved.