Prospects for Increasing Nominal Operating Pressure in Aircraft Hydraulic Systems using the Calculation Example of a Pipeline

Abstract

The article discusses trends in improving the on-board aircraft hydraulic systems, one of which is to increase the nominal operating pressure to 35 MPa or more. Combined with the use of high-strength materials due to increased pressure mass and volume reduction of hydraulic units and pipelines is achieved. A quantitative assessment of the gain in mass and volume of the hydraulic system elements of a number of aircraft is given when switching to higher pressures corresponding to optimal operation of hydraulic units for flight control and power supply. A method has been developed for calculating the volume and mass parameters of steel hydraulic pipelines depending on the nominal pressure, which can be used to determine the key characteristics of on-board hydraulic systems. It is shown that the relative decrease in the mass of the pipeline for pressures above 28 MPa largely depends on the calculated model of pipeline strength. Using the calculation example for the section of a centralized pipeline network of a hydraulic power supply system for wide-body long-range aircraft actuators according to regulatory standard, the main advantages are given, which are determined by reducing the weight and volume of pipelines due to higher pressure application compared with traditional solutions

Please cite this article in English as:

Erofeev E.V., Skryabin A.V., Veresnikov G.S. Prospects for increasing nominal operating pressure in aircraft hydraulic systems using the calculation example of a pipe-line. Herald of the Bauman Moscow State Technical University, Series Mechanical Engineering, 2026, no. 3 (158), pp. 81--101 (in Russ.). EDN: KBXBPQ

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