Design, optimization, and testing of a high-speed centrifugal pump for motorsport application

Mariani, Luigi; Giovine, Giammarco Di; Battista, Davide Di; Cipollone, Roberto

doi:10.1051/e3sconf/202131211006

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…The cooling pumps under investigation are a centrifugal and a screw-type volumetric pump. These pumps have been optimized and designed through a model-based design approach [36,37], which has been possible thanks to the corresponding mathematical models capable to predict their performances previously developed by the authors in [39,40,41]. A schematic of the model-based design procedure followed to develop the centrifugal pump proposed in this paper is represented in Figure 1.…”

Section: Model-based Pump Designmentioning

confidence: 99%

Comparison on the energy absorbed of volumetric and centrifugal pumps for automotive engine cooling

Giovine

Mariani

Bartolomeo

et al. 2022

J. Phys.: Conf. Ser.

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Engine thermal management can reduce significantly CO2 emissions in road vehicles without altering sensibly the engine layout. However, more efficient auxiliaries also participate to fuel consumption saving and, therefore, to CO2 emissions reduction. Typically, centrifugal cooling pumps are adopted as circulating devices, but their efficiency varies highly with rotational speed, wasting energy during real operation despite being optimized at the design point. Instead, volumetric pumps keep a high efficiency also far from it, enhancing the overall engine efficiency. In this paper, the performances of a screw-type volumetric pump have been compared with those of a centrifugal pump considering the same cooling circuit of a mid-size engine for passenger vehicles. Both pumps have been designed to satisfy the cooling flow rate required by the engine during a homologation cycle, while verifying their capability to cool the engine operating at maximum power. Once prototyped, the pumps performance maps have been measured, showing a high Best Efficiency Point for both cases. However, the screw pump has better performance in off-design conditions, being the centrifugal pump efficiency strictly dependent on its rotational speed which significantly changes during a real driving. The comparison of the two pumps has been done by reproducing the WLTC on a dynamic test bench. The rotational speed of the volumetric pump has been adjusted to deliver the same flow rate produced by the centrifugal pump as requested by the engine. Results show that the prototyped screw-type volumetric pump absorbs 21% less energy than the prototyped centrifugal pump, reducing CO2 emissions by 0.28 g/km.

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Section: Model-based Pump Designmentioning

confidence: 99%

Comparison on the energy absorbed of volumetric and centrifugal pumps for automotive engine cooling

Giovine

Mariani

Bartolomeo

et al. 2022

J. Phys.: Conf. Ser.

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Model Based Design, Prototyping and Testing of a Small Size High Speed Electrically Driven Centrifugal Pump

Mariani

Giovine

Fremondi³

et al. 2022

SAE Int. J. Adv. & Curr. Prac. in Mobility

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<div class="section abstract"><div class="htmlview paragraph">Within automotive sector, there are several high-performance applications, like, for instance, those referred to racing and motorsport, where cooling needs are usually fulfilled by simple circuits with conventional low-efficiency pumps. The cooling needs in these applications are represented by low flow rates delivered (in the range of 10 - 50 L/min). The operating conditions of these small pumps are usually characterized by very high revolution speeds, which intrinsically cause low efficiency and critical intake phenomena (cavitation) if the design is not specifically optimized to address these concerns.</div><div class="htmlview paragraph">Hence, in this paper a small-size pump operating in the racing sector has been designed using a model-based approach, built and tested having reached both high efficiency (aimed to 50%) and absence of intake operational problems (cavitation). Starting from the specific cooling request (design flow rate equal to 14.0 L/min and pressure rise equal to 2.5 bar), the very limited space available on board oriented the design to an operational revolution speed of 12000 RPM. The interest of this study was to introduce a so high revolution speed in more conventional automotive cooling pumps electrically assisted, keeping high efficiency. In fact, the strong reduction of the size of the pump allows an easy and correct positioning on board.</div><div class="htmlview paragraph">The model-based design was done by a two-steps procedure. The first made use of a 0D model which, catching main physical phenomena of the flow even in simplified form, leads to an optimum geometrical design for the impeller and the volute. A final refinement has been done with a CFD code predicting the off-design performance and limiting cavitation zones. Cavitation, which is one of the most critical issues of high-speed pumps, was completely investigated through a CFD numerical analysis.</div><div class="htmlview paragraph">The pump has been prototyped and tested on a dynamic test bench for pumps, which reproduces homologation cycles and real driving. A good agreement has been reached between theoretical and experimental results, being the mean relative error on pressure rise for all operating point close to 4 %. This model-based procedure opens the way to support the development of electric water pumps for more conventional applications (automotive, light duty engines) in which a redesign will be focused to manage the thermal state of the engine and reduce the energy absorbed during the homologation cycle.</div></div>

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Design, optimization, and testing of a high-speed centrifugal pump for motorsport application

Cited by 2 publications

References 22 publications

Comparison on the energy absorbed of volumetric and centrifugal pumps for automotive engine cooling

Comparison on the energy absorbed of volumetric and centrifugal pumps for automotive engine cooling

Model Based Design, Prototyping and Testing of a Small Size High Speed Electrically Driven Centrifugal Pump

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