Research progress of drag reduction agent for rocket kerosene
Adding drag reduction agent to rocket kerosene is an effective means to improve its flow capacity in pipelines and reduce energy consumption,which is characterized by low cost,simple process,significant effect and high reliability.The type,addition amount and relative molecular weight of drag reduction agent,as well as the working condition parameters such as pipe diameter,flow rate,Reynolds number,fluid temperature and heat flow density on the drag reduction and heat transfer characteristics of rocket kerosene are reviewed.The progress of numerical simulation of the drag reduction and heat transfer by rocket kerosene drag reduction agent is introduced from the aspects of molecular dynamics simulation and computational fluid dynamics simulation.Both experimental studies and numerical simulation results have pointed out the core scientific problem of drag reduction in contradiction to heat transfer deterioration that urgently needs to be solved.The enhancement mechanism of drag reduction of viscoelastic polymer and the degradation mechanism by molecular scission and de-aggregation of polymer are summarized.The direction of drag reduction research are further pointed out from the aspects of experimental studies,numerical simulations and mechanism investigations.The aim is to provide necessary reference information for the development and application of novel drag reduction agents with high-efficiency.
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维普
