Numerical and experimental investigation of the metering characteristic and pressure losses of the rotary tubular spool valve

Okhotnikov, Ivan; Abuowda, Karem; Noroozi, Siamak; Godfrey, P. Brighten

doi:10.1016/j.flowmeasinst.2019.101679

Cited by 4 publications

(7 citation statements)

References 14 publications

(8 reference statements)

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“…Many studies have investigated the flow in hydraulic components such as elbows (Korkmaz et al 2021;Perumal and Ganesan 2016;Zahedi et al 2019), pipes (Düz 2019), bends (Reghunathan Valsala et al 2019Rinaldi et al 2019;Tarodiya et al 2020), Tjunctions Ŝtigler et al 2012) and valves (Okhotnikov et al 2020). Besides, studies on hydraulic filters have mainly examined the design (Momin et al 2017), optimization (Tekelioğlu et al 2020), clogging properties (Eker et al 2016), and strength (Momin et al 2017), in addition to fatigue (Park 2002), and contamination (Singh et al 2012;Zhang et al 2018).…”

Section: 𝛽 = 𝑁 𝑑 𝑈 𝑁 𝑑 𝐷mentioning

confidence: 99%

Experimental and Numerical Investigation of Fluid Flow in Hydraulic Filters

Korkmaz

Kibar

Yiğit

2022

JAFM

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Hydraulic systems are extensively used in industries. However, these systems must be free of contaminants to ensure their durability. When the contaminants entering the system are not removed with a suitable filter, sensitive parts such as pumps, motors, and actuators would be damaged. Therefore, hydraulic filters are critical elements in hydraulic systems. In this study, the flow and pressure drop in hydraulic filters were investigated experimentally and numerically. Although the main function of this device is to filter oil, it has many other functions in the system. Experiments were performed at eight Reynolds numbers in the range of 1250 -2350 at a constant viscosity. In the experiments, the pressure between the inlet and outlet of the filter was measured differently. The numerical results were used for detailed analysis of the flow after experimental verification. The analyses were performed using eight Reynolds numbers at laminar boundaries to examine the flow in the hydraulic filter. The results show that all surface areas of the filter element are not used homogeneously for fluid passage. The resultant pressure drop is due to the Dean vortex formed at the outlet of the hydraulic filter. The findings of this study can help better understand the flow recirculation regions that produce pressure drops and contaminant accumulation regions throughout a hydraulic filter from the inlet to the outlet of the flow path.

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Section: 𝛽 = 𝑁 𝑑 𝑈 𝑁 𝑑 𝐷mentioning

confidence: 99%

Experimental and Numerical Investigation of Fluid Flow in Hydraulic Filters

Korkmaz

Kibar

Yiğit

2022

JAFM

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“…On the other hand, multiway valves generally possess more intricate flow channel configurations than traditional valves. As the coolant flows through a multiway valve, the fluid frequently undergoes multiple changes in flow direction, which unavoidably leads to high local pressure loss [9]. Numerous studies have already demonstrated the significant impact of pressure drop and heat transfer loss caused by valves or pipelines on the performance of ITMSs for EVs [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Edvardsen et al [20] measured the pressure drop in the shut-in valve at 55 kPa. The pressure losses in rotary tubular spool valves [9], reversing valves [21], and Tesla valves [14] are proportional to the flow rate and viscosity of the fluid, and inversely proportional to the change in flow area [22]. Moreover, Liu et al [23] demonstrated that triangular rib tubes have lower pressure loss than square pipes.…”

Section: Introductionmentioning

confidence: 99%

Flow Loss Analysis and Structural Optimization of Multiway Valves for Integrated Thermal Management Systems in Electric Vehicles

Zheng

Wei

2023

Energies

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The multiway valve is the core component of the integrated thermal management system in an electric vehicle, and its heat transfer loss and pressure loss significantly impact the performance of the whole thermal management system. In this paper, heat transfer loss and pressure loss in multiway valves are investigated using three-dimensional unsteady numerical simulations. Heat transfer loss and pressure loss under different operating modes are revealed, and relationships between pressure loss and mass flow rate, inlet temperature, and valve materials are studied. The results show that the significant temperature gradient around the control shaft results in heat transfer loss and pressure loss mainly occurs around the junction of the control shaft and the shell, where the flow direction changes sharply. The pressure loss is nonlinearly and positively correlated with the mass flow rate. Furthermore, the main geometric parameters of the pipeline and the control shaft are optimized. The pressure loss firstly increases and then decreases, with the increasing curvature of the inner walls of the pipe corners in four flow channels. Compared with the structural optimization at the pipe corners, increasing the curvature of the inner wall of the control shaft and the shell corners reduces pressure loss continuously. Moreover, this study obtains an optimal structure with minimum pressure loss using coupled structure optimization at the control shaft and shell corners.

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“…Many studies have investigated the flow in pipeline systems. These works can be classified as straight pipe (Kitoh 1991), bends at different angles (Valsala et al 2019;Röhrig et al 2015;Liu et al 2019;Rinaldi et al 2019), elbow (Zahedi et al 2019), Tjunctions (Štigler et al 2012), manifold (Zardin et al 2017;Zhang et al 2019) valve (Okhotnikov et al 2020;Lisowski andRajda 2013) etc. Valsala et al 2019 studied the flow characteristics in a tube with a 90° bend, examining the effects of vane number and shape on pressure loss.…”

Section: Introductionmentioning

confidence: 99%

“…Murakami et al (1969) examined an experimental study about the flow in the commercial elbows, comparing the head loss and flow characteristics of a single elbow and two elbows. Okhotnikov et al (2020) performed an experimental and numerical study of a rotary tubular spool inside a valve. Flow and pressure losses in the valve, according to the angular positions of the spool, were investigated in their study.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of Flow in ‎Hydraulic Elbows

2021

JAFM

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Elbow fittings are common in hydraulic and pipeline systems. These components cause a significant pressure drop in the total pressure of a system. The banjo elbow is advantageous in areas low to the ground and where flexible connection angles are needed. However, this elbow yields a larger pressure drop than a standard elbow. Additionally, the position of the internal bolt in the banjo elbow cannot be determined prior to installation, which corresponds to a wide range of possible pressure drop. In this study, the pressure drop through a 3/8" banjo elbow is investigated for different positions of the internal bolt, experimentally and numerically. Experiments and simulations were carried out on hydraulic oil with four different Reynolds numbers ranging from 3111 to 6222 and at nine bolt connection angles ranging from 0° to 60°. Experiments were repeated with the standard elbow of the same size to compare the pressure drops to those of the banjo elbow. Pressure was measured at both the inlets and outlets of the elbows. The results suggest that the connection angle of the internal bolt is an important factor in the pressure drop and minor head loss through a banjo elbow. For Reynolds numbers of 3111 and 6222, an improvement in minor head loss by 33% and 58%, respectively, was achieved by adjusting the connection angle of the internal bolt in the banjo elbows.

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Numerical and experimental investigation of the metering characteristic and pressure losses of the rotary tubular spool valve

Cited by 4 publications

References 14 publications

Experimental and Numerical Investigation of Fluid Flow in Hydraulic Filters

Experimental and Numerical Investigation of Fluid Flow in Hydraulic Filters

Flow Loss Analysis and Structural Optimization of Multiway Valves for Integrated Thermal Management Systems in Electric Vehicles

Experimental and Numerical Investigation of Flow in ‎Hydraulic Elbows

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