Development and Investigation of a Piston Seal in the Form of a Smooth Stepped Groove For a Volumetric Hybrid Energy-Converting Piston Machine

Shcherba, V. Е.; Lysenko, E. A.; Nesterenko, G. A.; Grigor’ev, A. V.; Kondyurin, A. Yu.; Bazhenov, A. M.

doi:10.1007/s10556-016-0188-3

Cited by 9 publications

(3 citation statements)

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“…For accepted values n and ∆p, and also considering that the studied fluid is water, and at T = 293 K = 998.2 kg/m 3 and µ = 10 −2 Pa s, as well as considering that Re cr = 1000, we obtain that δ cr ≤ 80.5 µm, laminar mode will be realized with radial clearance values up to 80.5 µm. To calculate the step-type gap seal in [25], the equality of the combined costs is used Q 1 and Q 2 through its narrow and wide parts, while it is believed that the local resistance due to the step-type change in the radial clearance is negligible.…”

Section: Laminar Fluid Flowmentioning

confidence: 99%

“…It was shown in [24] that the rational values for a smooth gap seal for a crosshead free PHPM are (20 ÷ 30) μm. It was proved in [25] that rational clearances δ1 and δ2 are (30 ÷ 55) μm and (80 ÷ 110) μm for a steptype piston seal in a crosshead PHPM respectively. In this paper, we assume that δ1 is 25 μm, and δ2 is 50 μm, i.e., those values are close to rational.…”

mentioning

confidence: 99%

“…It was proved in [25] that rational clearances δ 1 and δ 2 are (30 ÷ 55) µm and (80 ÷ 110) µm for a step-type piston seal in a crosshead PHPM respectively. In this paper, we assume that δ 1 is 25 µm, and δ 2 is 50 µm, i.e., those values are close to rational.…”

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confidence: 99%

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Calculation of the Incompressible Viscous Fluid Flow in Piston Seals of Piston Hybrid Power Machines

et al. 2020

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The article considers the calculation of the flow of a viscous incompressible fluid in piston seals of piston hybrid power machines. The most widely used and effective seals are considered: a smooth gap seal and a step-type gap seal, and—based on the references analyses—the initial boundary conditions for their calculation are determined. The laminar and turbulent flows in gap seals are calculated based on the well-known analytical relationships, experimental studies and flow models, including the k-ε, Menter’s Shear StressTransport (SST) and Reynolds Stress (RSM) turbulence models. The effectiveness of using each model to determine average velocities, flow rates, and velocity plots in the cross section of a gap seal, as well as the adequacy of the description of known physical laws, is estimated. The results proved that the RSM turbulence model is better for the gap seals of different types under different modes of motion.

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Section: Laminar Fluid Flowmentioning

confidence: 99%

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confidence: 99%