Design and numerical analysis of cooling circuit for multistage canned pump

Zhou, Yisong; Kong, Fanyu; Bai, Yang; Cao, Ruijia

doi:10.1063/1.4982492

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…With the rotor immersed in the operating medium, additional water friction loss occurs and leads to temperature rise of the partial flow that passes through the air-gap. Although this issue has been studied in the field of reactor coolant pumps and oil & gas pumps, however, these pumps generally operate at speeds below 3000 r/min [11][12][13][14]. As the speed comes to over 30000 r/min in propellant pumps for rocket engines, the water friction loss increases intensely and makes the major loss of the canned motor.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the internal temperature rise of a high-speed canned motor pump for liquid rocket engines

Wang,

Cai,

et al. 2024

J. Phys.: Conf. Ser.

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High-speed electric pumps are now gradually applied in liquid rocket engines. Compared with the pumps with dynamic seals, the canned motor pumps are more reliable, and thus suitable for delivering risky propellants. However, the partial flow diverted to the air-gap for cooling and lubrication faces the risk of overheating caused by its friction against the rotor. This paper performed an experiment on this issue with a high-speed canned motor pump for a notional rocket engine. Impellers with and without balance holes, as well as different configurations of jet holes, were adopted and their effects were analysed. Results showed that the internal temperature rise decreased by up to 78% when the balance holes were removed, and decreased by up to 40% when the jet hole configuration was modified. Both factors influenced the internal temperature rise by varying the flow rate of the cooling recirculation. The study suggested that the high-speed canned motor pump should be designed with an appropriate flow rate of the cooling recirculation, so as to control the temperature rise of the propellant and ensure safe operation of the rocket engine.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the internal temperature rise of a high-speed canned motor pump for liquid rocket engines

Wang,

Cai,

et al. 2024

J. Phys.: Conf. Ser.

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Internal Flow Field and Loss Analysis of a Magnetic Drive Pump’s Cooling Circuit

Kong

Zhang

et al. 2023

Energies

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The cooling circuit is an important component of the magnetic drive pump because it prevents demagnetization of the permanent magnet and damage to the containment shell owing to a high temperature increase. In this paper, the flow field and losses of the cooling circuit of the magnetic pump are discussed and experimentally verified based on numerical simulation methods. Five different lengths of magnetic couplings were designed, and the flow field distribution, cooling flow rate, and loss variation laws of the cooling circuit were analyzed. The results show that the pump flow rate and magnetic coupling length have a minimal effect on the velocity distribution in the cooling circuit. When the magnet length increases from 30 mm to 55 mm, the temperature rise of the cooling circuit and the pressure drop at the gap increase by 23.1% and 25.3%, respectively. When the length of the magnetic coupling remains constant, the cooling flow rate of the cooling circuit falls with an increasing pump flow rate, and it reduces by 8.4% when the pump flow rate increases from 0.7 Q to 1.3 Q. The water friction loss and eddy current loss of the cooling circuit increase with an increase in the magnetic coupling length, while the cooling flow rate decreases. When the magnet length increases from 30 mm to 55 mm, the eddy current losses in the coupling circuit and the water friction losses in the cooling circuit increase by 45% and 35%, respectively, while the cooling flow rate decreases by 13%.

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Design and numerical analysis of cooling circuit for multistage canned pump

Cited by 2 publications

References 5 publications

Experimental study on the internal temperature rise of a high-speed canned motor pump for liquid rocket engines

Experimental study on the internal temperature rise of a high-speed canned motor pump for liquid rocket engines

Internal Flow Field and Loss Analysis of a Magnetic Drive Pump’s Cooling Circuit

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