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NO PLIF multivariable con resolución espectral a kHz en chorro supersónico
Optics letters
|February 13, 2026
Resumen
Este estudio presenta la fluorescencia inducida por láser planar multivariable con resolución espectral (SR-PLIF) rápida para mediciones precisas de temperatura, presión y velocidad en flujos de alta velocidad. La técnica ofrece datos resueltos espacialmente y sin calibración, cruciales para validar simulaciones complejas.
Área de la Ciencia:
- Dinámica de fluidos
- Diagnóstico basado en láser
- Espectroscopía
Sus antecedentes:
- La caracterización de flujos de alta velocidad requiere mediciones cuantitativas de alto ancho de banda de temperatura, presión y velocidad.
- La validación de simulaciones numéricas complejas de dinámica de fluidos es esencial para avanzar en aplicaciones de ingeniería.
- Las técnicas de diagnóstico existentes pueden carecer de la resolución espacial o las capacidades multivariable necesarias para un análisis exhaustivo del flujo.
Objetivo del estudio:
- Demostrar una técnica rápida de fluorescencia inducida por láser planar con resolución espectral (SR-PLIF) multivariable.
- Permitir mediciones de temperatura, presión y velocidad resueltas espacialmente y sin calibración.
- Validar la técnica SR-PLIF para caracterizar flujos de alta velocidad y apoyar simulaciones numéricas.
Principales métodos:
- Se utilizaron bandas gamma de óxido nítrico cerca de 225,33 nm para fluorescencia inducida por láser planar con resolución espectral (SR-PLIF).
- Se empleó una celda de gas estática para la validación en un rango de temperatura de 295-420 K y un rango de presión de 3,48-20,4 kPa.
- Se aplicó el diagnóstico SR-PLIF para estudiar un chorro infraexpandido a tasas de hasta 1 kHz con una resolución espacial de 220 µm.
Principales resultados:
- Se logró un error promedio de temperatura del 2% y un error de presión del 4% durante la validación en una celda de gas estática.
- Se demostró la aplicación exitosa de SR-PLIF a un chorro infraexpandido a altas tasas de adquisición.
- Se observó una concordancia favorable entre las mediciones de SR-PLIF y las simulaciones numéricas del chorro infraexpandido.
Conclusiones:
- La técnica SR-PLIF desarrollada proporciona mediciones multivariable precisas y sin calibración para la caracterización de flujos de alta velocidad.
- SR-PLIF es una herramienta valiosa para validar simulaciones numéricas, mejorando la fiabilidad de la dinámica de fluidos computacional.
- Esta capacidad de diagnóstico rápido abre nuevas vías para el estudio de fenómenos de flujo dinámicos y complejos.
Palabras clave:
fluorescencia inducida por láserresolución espectraldinámica de fluidosflujos de alta velocidadmedición de temperaturamedición de presiónmedición de velocidadchorro supersónicoóxido nítricovalidación de simulacionesMás Videos Relacionados
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