2022
DOI: 10.1088/1361-6501/ac8a0a
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Simultaneous measurement of pressure and temperature in a supersonic ejector using FBG sensors

Abstract: In this work, we have demonstrated the use of Fiber Bragg Grating (FBG) sensors for simultaneous measurement of wall static pressure and temperature in a supersonic ejector. Supersonic ejectors are ground based high speed aerodynamic test facilities characterized by harsh conditions such as high pressure and temperature gradients. FBG based sensor setup was developed consisting of pressure measuring bare FBG and specially designed pressure-insensitive FBG temperature probe that could be mounted on the wall of … Show more

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Cited by 15 publications
(7 citation statements)
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“…When broadband light from the source propagates through the grating, the maximum light intensity reflected occurs at the FBG center wavelength λ, which then can be defined as Eq. ( 1) [15]. The effective refractive index, 𝑛 𝑒𝑓𝑓 , and the grating period, 𝛬, are affected by the measurand, such as strain or temperature, resulting in a wavelength shift from the initial value, 𝜆.…”
Section: Sensing Structure and Measurement Principlementioning
confidence: 99%
“…When broadband light from the source propagates through the grating, the maximum light intensity reflected occurs at the FBG center wavelength λ, which then can be defined as Eq. ( 1) [15]. The effective refractive index, 𝑛 𝑒𝑓𝑓 , and the grating period, 𝛬, are affected by the measurand, such as strain or temperature, resulting in a wavelength shift from the initial value, 𝜆.…”
Section: Sensing Structure and Measurement Principlementioning
confidence: 99%
“…In recent years, DOFS has been applied in aircraft structures [15], civil engineering [16], medical devices [17], structural health monitoring [18] and other fields [19][20][21]. As a sensor, optical fiber has many key advantages over other traditional sensors, such as large range, adaptability to harsh environments, high embeddability, sensitivity to a wide range of parameters, resistance to electromagnetic and voltage, etc [22].…”
Section: Introductionmentioning
confidence: 99%
“…Electromechanical sensors can not provide reliable monitoring for spacecraft during service. Unlike electromechanical sensors, FBG sensors exhibit many advantages, such as miniature size, corrosion resistance, immunity to EMI, and multiplexing capability [9]. Therefore, FBG sensors effectively monitor spacecraft deformation to increase transport efficiency and meet the need for lightweight development for new-generation spacecraft.…”
Section: Introductionmentioning
confidence: 99%
“…Generally, some strategies such as special package design of FBG sensors and combination configuration of FBG sensors, have been presented to distinguish the cross-sensitivity effect between strain and temperature [9][10][11][12][13][14][15][16][17]. A number of similar techniques for simultaneously measuring temperature and strain have been proposed [9][10][11][12], including the use of two types of FBGs, such as a pair of etched and un-etched polymer FBG functions as a sensor [11], the combination of a FBG and two PM-PCF with different coatings [10], a FBGembedded CFRP rod [12]. While these methods may be able to distinguish a cross-sensitivity between strain and temperature, most of them require the use of different fibre types and FBGs or any extrinsic special techniques [11].…”
Section: Introductionmentioning
confidence: 99%
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