This study proposes using two-color pressure-sensitive paint (PSP) to measure the pressure distribution of a model exposed shockwave. PSP was chosen over traditional techniques because wired connection may affect flight dynamics, and an onboard transducer weight distribution. Additionally, allowed for consistent measurement despite motion model. An unsecured 10 mm diameter cylinder coated in placed into blast tube. The then shockwave, subsequent flow results were recorded high-speed color...

The design of a proton beam line for medical science is presented. A energy ranging from 150 to 300 MeV obtained by decelerating the 500-MeV KEK booster synchrotron in carbon degrader. Problems associated with use degrader are discussed detail. available intensity at 250 estimated be 2×10 9 protons per pulse repetition rate 20 Hz. provides an achromatic, horizontal and vertical beam. former suitable diagnosis, availability both increases usefulness radiotherapy.

View Video Presentation: https://doi.org/10.2514/6.2021-0330.vid Optical measurement techniques have evolved significantly in recent years for Fluid-Structure Interaction (FSI) studies. Pressure-Sensitive Paints (PSPs) are frequently applied to provide global surface pressure distributions FSI both steady and unsteady flows. A motion-capturing PSP method can be used measure the distribution on objects motion such as rotating blades, while conventional intensity methods not available study of...

Pressure-sensitive paint (PSP) has received significant attention for capturing surface pressure in recent years. One major source of uncertainty PSP measurements, temperature dependency, stems from the fundamental photophysical process that allows to extract information. The motion-capturing method, which involves two luminophores, is introduced as a method reduce measurement due dependency. A theoretical model dependency proposed and demonstrated using static with an applied gradient....

The present study focuses on the challenges of capturing surface pressure data a free-flight object in ballistic range facility. There are four main challenges: (1) shooting an aerodynamic model range; (2) trajectory; (3) luminescent images during flight; and (4) obtaining distribution from images. Prior work has been successful with first two challenges; this will focus methods to overcome third fourth using two-color pressure-sensitive paint (PSP). Using PSP allows implementation...

A new and unique method of proton computed tomography is proposed. Integrated electron-density distributions along a few tens parallel paths are obtained at once by precisely measuring the energies incident outgoing protons. The energy measured magnetic spectrometer. With this method, CT with high density resolution, spatial lower dose can be realized in short scanning time.

Abstract Misfit layer compounds consist of two sublattices that are incommensurately modulated. These have the structures cubic monochalcogenide and transition‐metal dichalcogenide monolayers. In this work, a semiconducting misfit compound (LaS) 1 . 20 CrS 2 is synthesized by chemical vapor transport. absence intervening LaS layers, does not exist in stable state. Using thin flakes obtained mechanical exfoliation, field‐effect transistors fabricated. The devices show n‐type transport...

The motion-capturing TSP-heater system on a pitching airfoil was developed. TSP method captures surface temperature under motion, while conventional intensity requires separate measurement of reference image. A two-color and sprayable graphene-based heater coating were newly developed for the system. Through calibration, sensitivity determined as -2.66%/°C. As demonstrations application system, measurements at 0° 20° AoAs performed 10m/s free stream velocity.

View Video Presentation: https://doi.org/10.2514/6.2021-0871.vid A motion-capturing pressure sensitive paint (PSP) system is used to collect transient surface data on a 30mm diameter sphere model in free flight at Mach 1.5. The PSP able remove effects due variations illumination during flight, drastically reducing error free-flight measurements. Luminescent images of the are collected 100kHz with an exposure time 3.75μs using high-speed camera. fully view for 7 frames, or 70μs. Transient...

View Video Presentation: https://doi.org/10.2514/6.2021-0125.vid Pressure-Sensitive Paint (PSP) has been used in aerodynamic measurements as an optical pressure sensor. The PSP dynamic response needs to be characterized terms of a time and frequency response. Each characterization individually used, correlation between the two not modeled. In this paper, analytical model for is proposed combining luminescence distribution inside layer diffusion equation. describes responses response, with...

Optical measurement techniques have evolved significantly in recent years. Pressure-Sensitive Paints (PSPs) are utilized to provide global surface pressure distributions steady and unsteady flow. A Motion-capturing PSP method can capture the distribution on transient motion objects such as rotating blades, while a conventional intensity requires separate of reference image. The motion-capturing was applied 400 [mm] diameter blade spinning at 100 [Hz]. Time-resolved during rotation were...

View Video Presentation: https://doi.org/10.2514/6.2021-0328.vid Pressure-sensitive paint (PSP) has received significant attention as a surface pressure measurement tool in recent years. Due to the temperature dependency of PSP, which introduces additional uncertainty, quantitative is still challenging if distribution exits. The motion-capturing method, involves two luminophores, selected potential method reduce uncertainty due temperature. A theoretical model for proposed and validated...

Pressure-sensitive paint (PSP) has received significant attention for capturing surface pressure in recent years. One major source of uncertainty PSP measurements, temperature dependency, stems from the fundamental photophysical process that allows to extract information. The motion-capturing method, which involves two luminophores, is introduced as a method reduce measurement due dependency. A theoretical model dependency proposed and demonstrated using static with an applied gradient....

The wake response downstream of a spanwise-oscillating hemispherical turret was investigated experimentally using Pressure Sensitive Paint (PSP), along with several unsteady pressure sensors, placed on the and tunnel wall. PSP painted in region order to compare globally reconstructed fields between oscillating stationary cases. It found that fluctuations were less energetic for more organized spanwise direction, compared wake. POD DMD analysis revealed is characterized by global shifting...

View Video Presentation: https://doi.org/10.2514/6.2022-1662.vid The present study investigates the applicability of artificial neural network (ANN) model to predict pressure sensitivity chemical and physical factors. ANN was constructed trained using an experimental augmented dataset consisting paint thickness, luminophore, sensitivity. predicted thickness luminophore content within confidence intervals based on errors.

View Video Presentation: https://doi.org/10.2514/6.2021-0124.vid Pressure-sensitive paint (PSP) uses oxygen quenching to relate in a test gas the pressure. PSP technique has been used capture aerodynamic measurements. A pressure resolution is one of improving factors for measurement. This paper focuses on fundamental feature PSP: content gas. An analytical model proposed improve by increasing change luminescent signal optimizing concentration The was validated experimental result. determines...

An artificial neural network (ANN) was constructed and trained for predicting pressure sensitivity using an experimental dataset consisting of luminophore content paint thickness as chemical physical inputs. A data augmentation technique used to increase the number points based on limited observations. The prediction accuracy ANN evaluated by a metric, mean absolute percentage error. predicted thickness, within confidence intervals errors. present approach applying has potential predict...