Erosion by Liquid Impact

DeCorso, S. M.; Kothmann, R.E.

doi:10.1520/stp45079s

Cited by 6 publications

(9 citation statements)

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“…The flash is thought to be due to adiabatic compression of an air layer trapped between the liquid and the solid. DeCorso & Kothmann (1962), in a more extensive study of the flash, also arrived at this conclusion. An example of the impact flash is shown in figure 3, plate 3.…”

Section: T He Impact Pressurementioning

confidence: 70%

“…More recent studies of the physics of impact have been of two kinds; in one the solid target is fired at a stationary suspended drop (Engel 1955? I959j J enkins & Booker i960), and in the other a liquid drop in the form of a cylindrical jet is projected at a stationary target (Bowden & Brunton 1961;Bowden Sc Field 1964;DeCorso & Kothmann 1961). The information derived from both kinds of study is similar if allowance is made for the differences in geometry.…”

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confidence: 99%

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A discussion on deformation of solids by the impact of liquids, and its relation to rain damage in aircraft and missiles, to blade erosion in steam turbines, and to cavitation erosion - High speed liquid impact

Brunton

1966

Phil. Trans. R. Soc. Lond. A

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A study has been made of the deformation at high strain rates of solids under the impact of liquids. A method is described for projecting a short liquid jet against a solid surface at speeds up to 1200 m/s. The flow of the liquid and the deformation of the solid during impact have been examined by high speed photographic methods. An attempt has been made to measure the magnitude and duration of the load by means of a piezoelectric pressure transducer. There is evidence that the liquid behaves initially on impact in a compressible manner. Part of the deformation of the solid is due to this compressible behaviour and part to the erosive shearing action of the liquid flowing at very high speeds out across the surface. The mode of deformation in brittle and in plastically deforming materials has been investigated. The deformation patterns produced are shown to be characteristic of liquid impact. The predominating mechanism of deformation depends on the mechanical properties of the solid and on the velocity of impact.

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Section: T He Impact Pressurementioning

confidence: 70%

mentioning

confidence: 99%

A discussion on deformation of solids by the impact of liquids, and its relation to rain damage in aircraft and missiles, to blade erosion in steam turbines, and to cavitation erosion - High speed liquid impact

Brunton

1966

Phil. Trans. R. Soc. Lond. A

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“…Time series of the resulting DSD, AR and v f are integrated with wind turbine tip-speeds derived from remotely sensed wind speeds. Specifications from the WindPACT 3.0 MW turbine [52] (Section 2.3) are used to compute accumulated kinetic energy transfer to the blades (Section 2.4) and estimates of blade lifetimes are derived using the Springer model [49,53,54] (Section 2.5). Results of those calculations are compared and contrasted across the three disdrometers and used within a simple levelized cost of energy (LCoE) model to assess the optimal use of the erosion-safe mode required to minimize LCoE (Section 2.6).…”

Section: Overview Of Research Methodologymentioning

confidence: 99%

“…A range of modeling techniques has been advanced to simulate the process of material stresses that lead to blade leading-edge erosion [67][68][69]. Herein, we use the Springer model [49,54] combined with Miner's rule. The Springer model uses material properties of the blade and coating and the hydrometeor impact number, diameter, velocity and impact angle to estimate a distance to failure for each hydrometeor diameter.…”

Section: Modeling the Blade Lifetimesmentioning

confidence: 99%

From Hydrometeor Size Distribution Measurements to Projections of Wind Turbine Blade Leading-Edge Erosion

Letson

Pryor

2023

Energies

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Wind turbine blade leading-edge erosion (LEE) is a cause of increased operation and maintenance costs and decreased annual energy production. Thus, detailed, site-specific quantification of likely erosion conditions are critically needed to inform wind plant owner/operator decisions regarding mitigation strategies. Estimating the damage potential at a wind plant site requires accurate measurement of precipitation intensity, phase, droplet size distributions, wind speeds and their joint statistics. The current work quantifies the effect of disdrometer type on the characterization of LEE potential at a site in the US Southern Great Plains. using observations from three co-located disdrometers (an optical, an impact and a video disdrometer), along with hub-height wind-speed observations from a Doppler lidar and two LEE models: a kinetic energy model and the Springer model. Estimates of total kinetic energy of hydrometeor impacts over the four-year study period vary by as much as 38%, and coating lifetime derived from accumulated distance-to-failure estimates from the Springer model differ by an even greater amount, depending on disdrometer type. Damage potential at this site is concentrated in time, with 50% of impact kinetic energy occurring in 6–12 h per year, depending on which set of disdrometer observations is used. Rotor-speed curtailment during the most erosive 0.1–0.2% of 10 min periods is found to increase blade lifetimes and lead to the lowest levelized cost of energy.

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“…The staged rich-lean gas turbine engine combustion system has been the subject of numerous investigations directed at substantiating the capability of burning nitrogen bearing fuels without producing high emissions of nitric oxides. Many tests conducted to evaluate the potential of this combustion system when operating with coalderived liquid fuels have been conducted using subscale burners because of the high cost and limited quantities of fuel available (e.g., (1)(2)(3). Questions arise as to the applicability of the subscale test findings when predicting the capabilities of full scale devices.…”

Section: Introductionmentioning

confidence: 99%

Testing of a Full-Scale Staged Combustor Operating With a Synthetic Liquid Fuel

McVey

Kenndy

Sederquist

et al. 1983

Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations

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The staged rich-lean gas turbine engine combustion system has been the subject of numerous investigations directed at substantiating the capability of burning nitrogen bearing fuels without producing high emissions of nitric oxides. Many tests conducted to evaluate the potential of this combustion system when operating with coal-derived liquid fuels have been conducted using subscale burners because of the high cost and limited quantities of fuel available (e.g., (1–3). Questions arise as to the applicability of the subscale test findings when predicting the capabilities of full scale devices. In order to evaluate the efficacy of applying subscale results to large scale devices, a program was undertaken to test a 25-cm dia staged rich-lean combustor having similar characteristics to a previously tested 12.5-cm dia combustor and to identify areas where scale effects prove to be critical.

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Erosion by Liquid Impact

Cited by 6 publications

References 0 publications

A discussion on deformation of solids by the impact of liquids, and its relation to rain damage in aircraft and missiles, to blade erosion in steam turbines, and to cavitation erosion - High speed liquid impact

A discussion on deformation of solids by the impact of liquids, and its relation to rain damage in aircraft and missiles, to blade erosion in steam turbines, and to cavitation erosion - High speed liquid impact

From Hydrometeor Size Distribution Measurements to Projections of Wind Turbine Blade Leading-Edge Erosion

Testing of a Full-Scale Staged Combustor Operating With a Synthetic Liquid Fuel

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