Experimental investigation of aero-optics induced by supersonic film based on near-field background-oriented schlieren

Haolin Ding; Shihe Yi; Xinhai Zhao

doi:10.1364/AO.58.002948

Applied Optics
Vol. 58,
Issue 11,
pp. 2948-2962
(2019)
•https://doi.org/10.1364/AO.58.002948

Experimental investigation of aero-optics induced by supersonic film based on near-field background-oriented schlieren

Haolin Ding, Shihe Yi, and Xinhai Zhao

Not Accessible

Your library or personal account may give you access

Get PDF
Email
Share
Get Citation
Copy Citation Text
Haolin Ding, Shihe Yi, and Xinhai Zhao, "Experimental investigation of aero-optics induced by supersonic film based on near-field background-oriented schlieren," Appl. Opt. 58, 2948-2962 (2019)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Citation alert
Save article

Check for updates

Abstract

The effective acquisition of a distorted wavefront is the foundation of studying how to suppress and correct aero-optical effects. The background-oriented schlieren (BOS) technique, as a commonly quantitative measurement method of flow field, has great application potential in aero-optical effect measurement. With consideration of the thickness change of the refractive index field, introduction of near-field correction and construction of the double telecentric configuration, wavefront measurement accuracy was improved. A standard plano-convex lens was utilized to quantitatively evaluate the improved results, and the effectiveness of the improvement was verified. Determination methods of spatial resolution, sensitivity, and dynamic measurement range of wavefront measurement based on BOS were studied. The influences of cross-correlation interrogation window size and step length on the wavefront reconstruction accuracy were investigated. The step length should be less than the size of the interrogation window to make the reconstructed results have a satisfactory accuracy. Wavefront results of supersonic film at different positions and cases were obtained. The fitting results show that there is a good linear relationship between the root mean square of the optical path difference ( ${OPD}_{rms}$ ) and $ρ_{1} / ρ_{\infty}$ at different locations. Under different experimental cases, the aero-optical distortion tends to become stronger first and then weaker along the flow direction, and the aero-optical distortion around Position 3 is relatively strong. The large aperture approximation can be used to predict Strehl ratio values effectively in a considerable range by ${OPD}_{rms}$ .

Full Article | PDF Article

More Like This

Experimental investigation on aero-optical effects of a hypersonic optical dome under different exposure times

Haolin Ding, Shihe Yi, Xinhai Zhao, and Yao Xu
Appl. Opt. 59(13) 3842-3850 (2020)

Experimental investigation on the aero-optical effects of supersonic gas films with various cooling fluids

Xu Yao, Ding Hao-Lin, Zhang Bo, and Yi Shi-He
Appl. Opt. 62(32) 8614-8620 (2023)

Experimental investigation on aero-optics of supersonic turbulent boundary layers

Haolin Ding, Shihe Yi, Yangzhu Zhu, and Lin He
Appl. Opt. 56(27) 7604-7610 (2017)

Previous Article Next Article

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (16)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (5)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (20)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Case	$P_{2}$ (kPa)	$P_{1, 0}$ (MPa)	$P_{1, 0}^{'}$ (MPa)	$P_{1}^{'}$ (kPa)	$ρ_{1}$ ( $kg / m^{3}$ )	$ρ_{2}$ ( $kg / m^{3}$ )	$Re \times 10^{- 7}$ ( $m^{- 1}$ )
1	21.15	0.84	0.80	20.21	0.67	0.25	3.57
2	26.00	1.03	1.06	26.78	0.89	0.30	4.72
3	32.20	1.27	1.27	32.08	1.07	0.37	5.66
4	39.90	1.58	1.53	38.65	1.28	0.46	6.82
5	48.20	1.91	1.91	48.25	1.60	0.56	8.51

$H$	$C_{corr} / (W + 2 L)$	$2 / (2 L + T_{e})$	$2 / (2 L + (T_{e} + T_{c}) / 2)$	$2 / (2 L + T_{c})$
$ε_{r}$ %	1.88	48.90	44.94	41.18

$s / pixels$ (μm)	$S$ (mm)	$S_{r}$ (mm)	$ε_{r}$ (%)	Time (s)	${OPD}_{\max}$ (μm)
4 (13.80)	0.16	0.29	11.41	8.85	5.37
8 (27.60)	0.33	0.45	4.94	8.41	10.74
16 (55.20)	0.66	0.78	1.88	8.30	21.47
32 (110.40)	1.31	1.44	1.92	8.89	42.94
64 (220.80)	2.62	2.75	2.14	8.32	85.88

$c / pixels$ (μm)	$C$ (mm)	$N \times N$	$ε_{r}$ (%)	Time (s)
2 (6.90)	0.082	$447 \times 447$	3.83	2939.19
4 (13.80)	0.16	$223 \times 223$	1.74	294.61
8 (27.60)	0.33	$111 \times 111$	1.88	13.21
16 (55.20)	0.66	$55 \times 55$	7.07	1.63
32 (110.40)	1.31	$27 \times 27$	10.17	1.06

Position	1	2	3	4	5
$K$	0.051	0.11	0.15	0.19	0.075
$q$	0.052	0.040	0.050	0.0040	0.073
Residual error $\times 10^{- 4}$	0.25	1.16	0.68	3.09	1.23

Abstract

Cited By

Figures (16)

Tables (5)

Equations (20)

Applied Optics