Preheat oven to 350 degrees F. Spray a 9-inch springform pan with nonstick baking spray.
Put flour, baking powder, and salt in bowl and whisk to combine.
Using stand mixer fitted with whisk attachment, whip eggs on medium speed until foamy, about 1 minute.
Add sugar and orange zest. Whip on high speed until mixture is fluffy and pale yellow, about 3 minutes.
Reduce speed to medium. With mixer running, slowly pour in oil and mix until oil is fully incorporated, about 1 minute.
Add half of flour mixture and mix on low speed until incorporated, about 1 minute, scraping down bowl as needed.
Add orange juice and mix until combined, about 30 seconds. Add remaining flour mixture and mix until just incorporated, about 1 minute, scraping down bowl as needed.
Pour batter into prepared pan. Sprinkle 2 tablespoons sugar over entire surface.
Bake until cake is deep golden brown and a toothpick inserted in the center comes out with a few crumbs, 40 to 45 minutes.
Let cake cool on a rack for 15 minutes. Remove side of pan and let cake cool completely, about 1 ½ hours.