Análisis Del Caudal en Un Disco De Freno Automotriz Con Álabes De Ventilación Tipo Naca 66-209, Utilizando Velocimetría Por Imágenes De Partículas

León, Ricardo Andrés García; Rivera-López, Jesús; Quintero-Orozco, Abner; Gutiérrez-Paredes, Guadalupe Juliana

doi:10.23850/22565035.1785

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…Finally, it is concluded that the disc with a configuration of 15 profiles is an excellent design option, because it has no blocking effects at low speeds, and in addition, aerodynamics presents and energetically as proposed by [14] [19].…”

Section: Methodsmentioning

confidence: 97%

Análisis del caudal de aire en un disco de freno automotriz con alabes de ventilación tipo N-38

2019

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El sistema de frenado de un automóvil debe satisfacer un conjunto complejo de requerimientos, siendo la seguridad lo más importante. En el diseño de estos sistemas, influye directamente una correcta geometría y una selección adecuada del material para garantizar su correcto funcionamiento. El objetivo de este trabajo, es proponer un nuevo arreglo geométrico para la optimización del flujo de aire en un disco de freno automotriz, teniendo en cuenta pilares de ventilación fundamentado en perfiles aerodinámicos tipo N-38. Para validar esta propuesta de diseño, fue construido un prototipo a escala 1:1 por medio de manufactura aditiva y de esta manera poder medir el campo de velocidades generado en la zona de succión y descarga utilizando Velocimetría por Imágenes de Partícula (VIP). El arreglo geométrico se llevó a cabo bajo dos condiciones de velocidad angular: 541 y 941 rpm. Los resultados obtenidos muestran la optimización de la velocidad del aire en la zona de descarga de 0.2121 y 0.743 m/s respectivamente para los rangos de velocidades; con lo que se evidencio la importancia de diseños experimentales con los cuales se pueda mejorar la geometría de los frenos de disco autoventilados y de esta manera garantizar la eficiencia y seguridad del sistema.

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Section: Methodsmentioning

confidence: 97%

Análisis del caudal de aire en un disco de freno automotriz con alabes de ventilación tipo N-38

2019

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“…These configurations have a more aerodynamic profile compared to the automotive disc brake with the NACA 66-209 type ventilation blades, which makes the airflow inside the ventilation blades circulate with better efficiency, and the rate of heat evacuated higher, thus increasing the efficiency of the disc brake. According to the authors of [22], an increase in the number of blades in the disc brake geometry design does not promote the block effect at low speeds and also provides better performance for heat dissipation. Table 5 presents the most relevant parameters and dimensions of the proposed brake discs.…”

Section: Proposal For a New Disc Brake Geometrymentioning

confidence: 99%

“…On the other hand, García-León et al [22] proposed a new geometric arrangement to improve airflow in a vehicular disc brake, considering the ventilation blades based on NACA 66-209 type aerodynamic profiles. To validate this design proposal, they constructed a 1:1 prototype with the aid of additive manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer and Speed Air Flow on Performance of an Auto-Ventilated Disc Brake

León

García

Camperos

2021

Fluids

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In the braking system, the heat dissipation generated by the friction between the disc and pad should be evacuated as quickly as possible. In this work, five common different automotive disc brakes were studied through mathematical theories of heat transfer and numerical methods using the ANSYS software. In addition, a direct comparison between experimental, theoretical, and simulation values found in the open literature was performed to propose a disc brake with an improved geometry in terms of dissipation of heat transfer. The numerical results were considered to propose two possible solutions of disc brake geometries using N-38 ventilation blades used in aeronautic engineering. An improvement in temperature dissipation was achieved by approximately 23.8% compared to the five geometries analyzed with a simple type N-38 ventilation blade. The heat dissipation in the brakes strongly depends on the geometry of the disc, the geometry of the blades, the material from which it is manufactured, the material of the pad, the weight of the vehicle, and the operating conditions, as can be verified with mathematical calculations and experiments. The results obtained demonstrate that the discs can be used effectively in extreme working conditions (80 km/h and 33°C), without affecting the safety of the occupants and the braking system.

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“…The N-38 type ventilation blade geometry improves heat dissipation during the braking process is proposed after analyzing the previous results in other studies. According to [13], an increase in the number of blades on the disc brake geometry with the block effect design does not promote low speed and provides better performance on the heat dissipation. Figure 1 shows the disc brake used: (a) 3D view, (b) transparent view, and (c) blade geometry.…”

Section: Disc Brake Geometrymentioning

confidence: 99%

“…On the other hand, García-León et al [13] proposed a new geometric arrangement to improve airflow in a common vehicular disc brake, considering the ventilation blades based on NACA 66-209 type aerodynamic profiles; this purpose was used particle image velocimetry (PIV) technique. The results indicate that a configuration of 20 blades improves heat dissipation [14,15].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Dynamic Maps of Disc Brakes under Different Operating Conditions

León

García

Camperos

2021

Fluids

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The operating conditions during the braking process in an automobile affect the tribological contact between the pad and disc brake, thus, influencing the times and distances of braking and, in a more significant way, the safety of the braking process. This mathematical work aimed to provide a general visualization of the disc brake’s mechanical, dynamic, and thermal behavior under different operating conditions through 2D maps of the power dissipated, braking time, and braking distance of a disc brake with a ventilation blade N- 38 type. However, the dissipated energy on the disc brake in terms of temperature was analyzed considering Newton’s cooling law and mathematical calculations through classical theories of the dynamic and mechanical behavior of the disc brakes. For this purpose, the Response Surface Methodology (RSM) and Distance Weighted Least Squares (DWLS) fitting model considered different operating conditions of the disc brake. The results demonstrate that the disc brakes can be used effectively in severe operational requirements with a speed of 100 km/h and an ambient temperature of 27 °C, without affecting the occupant’s safety or the braking system and the pad. For the different conditions evaluated, the instantaneous temperature reaches values of 182.48 and 82.94 °C, where the high value was found for a total deceleration to 100 km/h to 0, which represent a total braking distance of around 44.20 to 114.96 m depending on the inclination angle (θ). Furthermore, the energy dissipation in the disc brakes depends strongly on the disc, blades and pad geometry, the type of material, parameters, and the vehicle operating conditions, as can be verified with mathematical calculation to validate the contribution of the effectiveness of the braking process during its real operation.

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Análisis Del Caudal en Un Disco De Freno Automotriz Con Álabes De Ventilación Tipo Naca 66-209, Utilizando Velocimetría Por Imágenes De Partículas

Abstract: Analysis of the flow on an automotive brake disc with NACA 66-209 type ventilation alabs, using particle image velocimetry Análisis del caudal en un disco de freno automotriz con álabes de ventilación tipo NACA 66-209, utilizando velocimetría por imágenes de partículas

Cited by 5 publications

References 6 publications

Análisis del caudal de aire en un disco de freno automotriz con alabes de ventilación tipo N-38

Análisis del caudal de aire en un disco de freno automotriz con alabes de ventilación tipo N-38

Numerical Study of Heat Transfer and Speed Air Flow on Performance of an Auto-Ventilated Disc Brake

Mechanical and Dynamic Maps of Disc Brakes under Different Operating Conditions

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