Berechnungsmodell zur Auslegung von Seitenkanalmaschinen

Grabow, Gerd; Suong, Nguyen Duc

doi:10.1007/bf02560552

Cited by 3 publications

(4 citation statements)

References 1 publication

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“…Figure 1: Assembly of the investigated regenerative compressor (Beilke, 2005;Krake and Fiedler, 2000;Grabow and Suong, 1992) A regenerative compressor consists of the side channel in the casing, suction and discharge ports, the stripper and the impeller, see Figure 1. For the description of the flow and energy transfer in the machine the circulation theory by (Wilson et al, 1955) is mainly used.…”

Section: Side Channelmentioning

confidence: 99%

Design of Experiment on the influence of channel design onto regenerative compressor performance

Adam,

Heinrich,

Schwarze

2023

European Conference on Turbomachinery Fluid Dynamics and Thermodynamics

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For regenerative compressors the influence of the geometric parameters on the characteristic curve have not yet been fully explored. This work focuses on three of them: side channel height, change of the side channel area in circumferential direction and the side channel length. To evaluate the influence of the factors on the isentropic efficiency and the mass flow rate, a design of experiment approach with a full factorial design plan is employed. The factors are tested on two stages, using a linear model to describe the relation. The influence of the main effects is generally bigger than the secondary effects and stronger for higher pressures. For all cases, the impact on the mass flow rate is greater than that on the isentropic efficiency. The resulting model for optimisation has a statistical error of maximum ± 1.4% within the boundaries of the tested factors.

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Section: Side Channelmentioning

confidence: 99%

Design of Experiment on the influence of channel design onto regenerative compressor performance

Adam,

Heinrich,

Schwarze

2023

European Conference on Turbomachinery Fluid Dynamics and Thermodynamics

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“…This might also be Fig. 1 Assembly of the investigated side channel compressor the reason, why there are only few publications focusing on side channel pumps and compressors compared to more conventional machine types [8,16].…”

Section: Introductionmentioning

confidence: 99%

“…According to this theory, the fluid has a helical trajectory from the outer radius of the impeller into the side channel and back into Fig. 2 Helical flow pattern in a side channel compressor: cross-sectional view (a) and helical streamline in the side channel (b) [8,15,16] Fig. 3 Definition of different geometric parameters for the design guidelines by Grabow: Cross-sectional view of the side channel with outer radius of the impeller r o , median radius r m , inner radius r i , and channel radius r c (a); side view with blade angle !…”

Section: Introductionmentioning

confidence: 99%

Influence of different design parameters on side channel compressor performance

Adam

Heinrich

Schwarze

2022

Forsch Ingenieurwes

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Only few design guidelines for side channel compressors are published in open literature. Among those the most common ones are from Grabow, Surek, and Raheel. In this publication we focus on the design guideline of Grabow, which includes, among several analytical equations, two empirical estimates for head coefficient and blade angle. These estimates lead to an uncertainty in the design process and could potentially effect the performance curve of the machine. Therefore, five side channel compressor geometries are designed based on Grabow with different estimates for head coefficient and blade angle in order to assess their influence onto the compressor performance. Those designs are the input parameters for transient CFD simulations to compute total pressure ratio and isentropic efficiency. The results indicate that higher head coefficient during the design process lead to a higher total pressure ratio, in particular for lower flow rates. Similarly, a higher blade angle also increases the total pressure ratio and furthermore reduces the flow circulation in the side channel. In general, influence onto isentropic efficiency is much weaker, though.

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“…In [10] further analytical investigations related to the losses in regenerative turbomachines showed that the friction losses are the cause of the typically low efficiency. Grabow and Suong [11] used their analytical model to show the dependency of the head in correlation to the inlet and outlet blade angle. Further analytical approaches were derived in [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Wall Pressure and Blade Surface Pressure in a Side Channel Blower

Münsterjohann

Becker

2018

International Journal of Rotating Machinery

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In side channel blowers, the pressure field is the result of complex, inner flow mechanisms. While there are already experimental investigations on the wall pressure distributions, little is known about the pressure in the rotating system, i.e., on the blade surface. In this work, we present an experimental setup for measuring the unsteady blade surface pressure in several positions. The acquired data will be complemented by and compared to the additionally measured wall pressure on the side channel housing. Miniature pressure sensors are integrated into the impeller. It is modified to ensure flush mounted membranes of the sensors and to avoid impacting on the flow field. A telemetric system is used for a wireless transfer of the data from the rotating system to the data recorder. As a result, we show the time-resolved pressure distribution as well as its phase-locked ensemble average. The variations of the pressure field are related to the integral pressure difference across the turbomachine and to its rotational speed. Due to the high temporal resolution of the measurement data, an exact spatial localization of crucial flow phenomena is achieved. Low integral pressure differences show a nearly linear increase of the pressure in circumferential direction, while greater integral pressure differences evolve exponentially over the azimuth. The results confirm the circulatory flow theory. Different rotational speeds elicit a comparable behavior. The stripper is a dominant source for pressure fluctuations. Its individual geometric discontinuities are correlated to the flow field. Our results provide a deeper understanding of the flow phenomena in side channel blowers and the theory of pressure generation. Although the measurements were performed for only one type of side channel blower with a double-flow configuration and open blades, the energy transfer mechanism is the same for other modifications like single flow or closed blade versions.

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Berechnungsmodell zur Auslegung von Seitenkanalmaschinen

Cited by 3 publications

References 1 publication

Design of Experiment on the influence of channel design onto regenerative compressor performance

Design of Experiment on the influence of channel design onto regenerative compressor performance

Influence of different design parameters on side channel compressor performance

Wall Pressure and Blade Surface Pressure in a Side Channel Blower

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