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<p>The objective of this paper is to study the impact of the lubricating oil temperature on the characteristics of the differential pressure control valve (DPCV) by using Mixture model combined with RNG <i>k</i>-<i>ε</i> model. The numerical results indicate that the pressure pulsation, subsystem outlet flow, and valve overflow are consistent with the experimental data. The pressure characteristics of the DPCV include dynamic and steady-state characteristics. For the dynamic characteristics, as the temperature increases, the fluctuation ranges of spool displacement, speed, spring force and oil supply pressure (OSP) increase. Furthermore, these parameters exhibit a sinusoidal trend over time and the maximum values of them all decrease. In addition, the rise time of OSP gradually increases while delay time decreases. The adjustment time increases rapidly at first, then remains relatively stable of the change of the oil temperature. The overshoot of pressure decreases. For the steady-state characteristics, with the increment of oil temperature, valve inlet pressure (VIP) increases substantially before reaching the critical point (40&#xa0;°C). And after exceeding the point, VIP increases slightly. Moreover, the fluctuation amplitude of OSP follows a normal distribution with increasing temperature. When the temperature is 55&#xa0;°C, the OSP fluctuation amplitude peaks at a maximum of 53&#xa0;kPa, which will affect aero-engine lubrication performance adversely. The findings can provide a reference for the safe operation of the aero-engine lubrication system.</p>

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Investigation of the effect of temperature on the characteristics of differential pressure control valve

  • 期刊论文

  • 发表日期：

    2025年3月8日

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  • Y. Wang,
  • Y. Huang,
  • J. Chen,
  • M. Li,
  • X. Zhang,
  • H. L. Liu,
  • L. Zhang

摘要

The objective of this paper is to study the impact of the lubricating oil temperature on the characteristics of the differential pressure control valve (DPCV) by using Mixture model combined with RNG k-ε model. The numerical results indicate that the pressure pulsation, subsystem outlet flow, and valve overflow are consistent with the experimental data. The pressure characteristics of the DPCV include dynamic and steady-state characteristics. For the dynamic characteristics, as the temperature increases, the fluctuation ranges of spool displacement, speed, spring force and oil supply pressure (OSP) increase. Furthermore, these parameters exhibit a sinusoidal trend over time and the maximum values of them all decrease. In addition, the rise time of OSP gradually increases while delay time decreases. The adjustment time increases rapidly at first, then remains relatively stable of the change of the oil temperature. The overshoot of pressure decreases. For the steady-state characteristics, with the increment of oil temperature, valve inlet pressure (VIP) increases substantially before reaching the critical point (40 °C). And after exceeding the point, VIP increases slightly. Moreover, the fluctuation amplitude of OSP follows a normal distribution with increasing temperature. When the temperature is 55 °C, the OSP fluctuation amplitude peaks at a maximum of 53 kPa, which will affect aero-engine lubrication performance adversely. The findings can provide a reference for the safe operation of the aero-engine lubrication system.