Active Flow and Combustion Control 2014 by Rudibert King

By Rudibert King

The e-book studies at the most up-to-date theoretical and experimental advances within the box of energetic move and combustion keep an eye on. It covers new advancements in actuator expertise and sensing, in powerful and optimum open- and closed-loop keep watch over, in addition to in version aid for regulate. It collects contributions offered through the 3rd variation of the lively move and Combustion keep watch over convention, held in September 10-12, 2014 on the Technische Universität Berlin (Germany). This convention, in addition to the examine provided within the publication, were supported through the collaborative study middle SFB 1029 -Substantial potency bring up in gasoline generators via direct use of coupled unsteady combustion and circulate dynamics, funded through the DFG (German examine Foundation).

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Increasing the compressor’s safety margins by blade design measures is not an option. It often leads to a loss of compressor efficiency which may be greater than the gain in efficiency achieved by the novel combustion process. Alternatively, stable operation of the compressor can be ensured by means of closed-loop active flow control [19], [20]. In this contribution, the main objective of the feedback flow controller is the rejection of the disturbances seen in a cascade and induced by downstream pressure fluctuations.

This data was analysed by means of a Principal Component Analysis (PCA) [17]. The PCA has proven to be a useful tool to detect meaningful sensor positions for compressor stator cascade in a former study, see [28]. Fig. 6 shows the impact of the actuation by presenting the first Principal Component (PC) of the cp -distribution when the actuation amplitude is varied. 05 bar to umax , for different values of umax . The locations of the sensors that provide an informative real-time accessible surrogate control variable are schematically illustrated in Fig.

The progression of the surrogate control variable, was recorded. Both signals were used within the Prediction Error Method (PEM) [22] to determine a dynamic plant model. Since the cascade represents a nonlinear system, it cannot be described well by a single linear model. J. Steinberg et al. 5 x/L Fig. 6. Top: First PC that describes the impact of the actuation on the cp -distribution of the suction surface of the middle blade for different maximum actuation amplitudes umax . 85. 8 1 Fig. 7. Top: First (left) and second (right) PC describing the impact of the running disturbance generator on the cp -distribution of the suction surface of the middle blade.

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