An improved prediction model for corner stall in axial compressors with dihedral effect

Li, Jiabin; Ji, Lucheng

doi:10.1016/j.cja.2019.12.031

Cited by 10 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is already universally recognized that the boundary layers on the surfaces of the airfoil channels of turbomachines are three-dimensional rather than twodimensional [41,42,43]; therefore the flow separation is also three-dimensional. In contrast to the twodimensional model of the appearance of rotating stall based on the separation of the two-dimensional boundary layer according to the Moore -Rott -Sears's model item (2), a three-dimensional rotating stall is modelled on a model of three-dimensional separation of the boundary layer.…”

Section: Resultsmentioning

confidence: 99%

Creation of Afterburning Turbofan Engine – History and Present

Gerasimenko

Datsenko

Shevchenko

2020

aktt

View full text Add to dashboard Cite

The main problems of the creation of afterburning turbofan engines, among which the irremovable surge of the compressor, is disclosed by historical analysis. According to the published models, such surge is a hydrodynamic instability in the form of rotating stall mutual transitions to surge with the primary cause of instability in the form of stall or vibration combustion in the afterburner. The Pratt & Whitney F100 serial engine, which based on TF30 is one of the first in which the irremovable surge was detected. As a result, several planes F-15 crashed, so far as the compressor could not be restored to a stable state without stopping and restarting the engine. Dissection of the problem with this phenomenon led to the conclusion that this irremovable surge problem was generated by the engine design. To eliminate it, the company had to refine several systems, such as an electronic engine control system, fuel supply of the afterburner along with the nozzle locations, firing belt, combustion stabilization, an extension of flow separation along the contours, etc. According to the analysis of publications, particular difficulties arose with the recoverable unsurge operation of such engines. It is noteworthy that today, the F-135-PW100 engines have been installed on the F-35 aircraft, the predecessors of which are the F-100 engines with the same problems. The results of experimental studies of a fan are presented in the article to deepen in the stall flow mechanism and the occurrence of rotating stall of the fan blades. The perturbations from vibrational combustion in the afterburner combustion chamber to the fan stall boundary in the afterburning turbofan engine system at bench conditions were simulated by independent throttling of the duct over a wide range of the bypass ratio. Numerous monographs and publications according to vibrational combustion, in particular in afterburner combustion chambers TRDF AL-21F and TRDDF AL-31F, of A. M. Lulka, confirm the possibility of the propagation of perturbations against the flow in the bypass duct and the impossibility of their propagation through the turbines. The propagation of surge perturbations in the afterburning turbofan engine to the compressor of the internal duct behind the fan occurs through the interaction of the duct. The more reliable way to prevent emergencies is to provide stability margin area of compressors. Estimation of the pre-stall state of the flow traditionally is carried out by the diffusivity factor of Lieblein FD, which is applicable in 2D calculations. The integral variational principle of nonequilibrium thermodynamics of the “maximum flow of mechanical energy” of V. N. Yershov was applied.

show abstract

Section: Resultsmentioning

confidence: 99%

Creation of Afterburning Turbofan Engine – History and Present

Gerasimenko

Datsenko

Shevchenko

2020

aktt

View full text Add to dashboard Cite

show abstract

“…In contrast to theoretical models, the application potential of empirical criteria is limited by the range of experimental parameters from which they were derived. Despite the limitations, it is currently a widespread way of stall prediction [11] , [12] , [13] .…”

Section: Introductionmentioning

confidence: 99%

A method of stall recognition using nonlinear feature extraction from the compressor outlet pressure

Mlkvik,

Olšiak,

Knížat

2023

Heliyon

View full text Add to dashboard Cite

“…Since then, several approaches to stall prediction have been developed, such as small perturbation propagation theory, modifications of which still appear in the scientific literature [10], but the method loses validity in the case of a developed rotatingstall. Today, the most widely used method for predicting stall in compressors is based on empirical models [11,12]. However, these methods are limited by the amount of available experimental data.…”

Section: Introductionmentioning

confidence: 99%

Stall identification methods in centrifugal compressor

Mlkvik,

Knížat,

Olšiak

2023

MATEC Web Conf.

View full text Add to dashboard Cite

The presented paper describes a method for detecting compressor stall precursors in a measured pressure signal using procedures arising from the chaos theory. The experiment was carried out on a scaled-down model of a compressor used in natural gas transportation. It was a single-stage centrifugal compressor with a vane diffuser. The presented method is based on the analysis of an attractor constructed using the time delay method from the pressure signal collected at the compressor outlet flange at a frequency of 25 kHz. Using a parameter called correlation dimension, we identified small changes in the dynamics of the measured signal before the onset of negative stall manifestations. In general, it was found that near the stall curve there were minor disturbances in the flow field in the compressor, due to which the correlation dimension decreased.

show abstract

An improved prediction model for corner stall in axial compressors with dihedral effect

Cited by 10 publications

References 13 publications

Creation of Afterburning Turbofan Engine – History and Present

Creation of Afterburning Turbofan Engine – History and Present

A method of stall recognition using nonlinear feature extraction from the compressor outlet pressure

Stall identification methods in centrifugal compressor

Contact Info

Product

Resources

About